The first integral involves the square root of 2π multiplied by the cosine function. The second integral is a complex integral involving cosine and a rational function. The third integral involves the square root function, cosine, and a polynomial.
In contour integration, the idea is to deform the contour of integration to simplify the integrals by using properties of complex functions. For the first integral, the contour can be chosen as a semicircle in the upper half plane to avoid the branch cut of the square root function. By applying the residue theorem and evaluating the residues at the poles, the integral can be computed.
For the second integral, the contour can be chosen as a closed curve enclosing the real axis and the singularity of the rational function. The integral can then be expressed as a sum of integrals along the contour, and by applying the residue theorem and evaluating the residues at the singularities, the integral can be computed.
Similarly, for the third integral, the contour can be chosen appropriately to enclose the singularities and simplify the integral. By deforming the contour and applying the residue theorem, the integral can be evaluated.
Contour integration provides a powerful method for evaluating complex integrals, allowing us to compute the given integrals involving square roots, trigonometric functions, and rational functions by using techniques from complex analysis.
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y" + 2y' = 12t² d. y" - 6y'- 7y=13cos 2t + 34sin 2t eyn
the solution to the given differential equation is y(t) = C₁ + C₂e^(-2t) + 2t².The given differential equation is:
y" + 2y' = 12t²
To solve this differential equation, we need to find the general solution. The homogeneous equation associated with the given equation is:
y" + 2y' = 0
The characteristic equation for the homogeneous equation is:
r² + 2r = 0
Solving this quadratic equation, we find two roots: r = 0 and r = -2.
Therefore, the general solution of the homogeneous equation is:
y_h(t) = C₁e^(0t) + C₂e^(-2t)
= C₁ + C₂e^(-2t)
To find the particular solution for the non-homogeneous equation, we can use the method of undetermined coefficients. Since the right-hand side of the equation is in the form of 12t², we assume a particular solution of the form:
y_p(t) = At³ + Bt² + Ct
Differentiating y_p(t) twice and substituting into the equation, we get:
6A + 2B = 12t²
Solving this equation, we find A = 2t² and B = 0.
Therefore, the particular solution is:
y_p(t) = 2t²
The general solution of the non-homogeneous equation is the sum of the homogeneous and particular solutions:
y(t) = y_h(t) + y_p(t)
= C₁ + C₂e^(-2t) + 2t²
Hence, the solution to the given differential equation is y(t) = C₁ + C₂e^(-2t) + 2t².
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Find the position function x(t) of a moving particle with the given acceleration a(t), initial position Xo = x(0), and initial velocity vo = v(0). 2 a(t)= . v(0) = 0, x(0) = 0 (t+2)+ ... x(t) = 4'
To find the position function x(t) of a moving particle with the given acceleration a(t), initial position Xo = x(0), and initial velocity vo = v(0), you must first integrate the acceleration twice to obtain the position function.Here's how to solve this problem:Integrating a(t) once will yield the velocity function v(t).
Since v(0) = 0, we can integrate a(t) directly to find v(t). So,
2 a(t)= . a(t)
= (t + 2)
From the given acceleration function a(t), we can find v(t) by integrating it.
v(t) = ∫ a(t) dtv(t)
= ∫ (t+2) dtv(t)
= (1/2)t² + 2t + C
Velocity function with respect to time t is v(t) = (1/2)t² + 2t + C1To find the constant of integration C1, we need to use the initial velocity
v(0) = 0.v(0)
= (1/2) (0)² + 2(0) + C1
= C1C1 = 0
Therefore, velocity function with respect to time t is given asv(t) = (1/2)t² + 2tNext, we need to integrate v(t) to find the position function
x(t).x(t) = ∫ v(t) dtx(t)
= ∫ [(1/2)t² + 2t] dtx(t)
= (1/6) t³ + t² + C2
Position function with respect to time t is x(t) = (1/6) t³ + t² + C2To find the constant of integration C2, we need to use the initial position
x(0) = 0.x(0)
= (1/6) (0)³ + (0)² + C2
= C2C2
= 0
Therefore, position function with respect to time t is given asx(t) = (1/6) t³ + t²The position function of the moving particle is x(t) = (1/6) t³ + t².
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Suppose that 6 J of work is needed to stretch a spring from its natural length of 24 cm to a length of 39 cm. (a) How much work (in J) is needed to stretch the spring from 29 cm to 37 cm? (Round your answer to two decimal places.) (b) How far beyond its natural length (in cm) will a force of 10 N keep the spring stretched? (Round your answer one decimal place.) cm Need Help? Watch It Read It
Work done to stretch the spring from 24 cm to 29 cm = 2.15 J
Distance stretched beyond the natural length when a force of 10 N is applied ≈ 7.9 cm.
Work done to stretch the spring from natural length to 39 cm = 6 J
Natural Length of Spring = 24 cm
Spring stretched length = 39 cm
(a) Calculation of work done to stretch the spring from 29 cm to 37 cm:
Length of spring stretched from natural length to 29 cm = 29 - 24 = 5 cm
Length of spring stretched from natural length to 37 cm = 37 - 24 = 13 cm
So, the work done to stretch the spring from 24 cm to 37 cm = 6 J
Work done to stretch the spring from 24 cm to 29 cm = Work done to stretch the spring from 24 cm to 37 cm - Work done to stretch the spring from 29 cm to 37 cm
= 6 - (5/13) * 6
= 2.15 J
(b) Calculation of distance stretched beyond the natural length when a force of 10 N is applied:
Work done to stretch a spring is given by the equation W = (1/2) k x²...[1]
where W is work done, k is spring constant, and x is displacement from the natural length
We know that work done to stretch the spring from 24 cm to 39 cm = 6 J
So, substituting these values in equation [1], we get:
6 = (1/2) k (39 - 24)²
On solving this equation, we find k = 4/25 N/cm (spring constant)
Now, the work done to stretch the spring for a distance of x beyond its natural length is given by the equation: W = (1/2) k (x²)
Given force F = 10 N
Using equation [1], we can write: 10 = (1/2) (4/25) x²
Solving for x², we get x² = 125/2 cm² = 62.5 cm²
Taking the square root, we find x = sqrt(62.5) cm ≈ 7.91 cm
So, the distance stretched beyond the natural length is approximately 7.9 cm.
Work done to stretch the spring from 24 cm to 29 cm = 2.15 J
Distance stretched beyond the natural length when a force of 10 N is applied ≈ 7.9 cm.
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Let E be the solid bounded by the surfaces z= y, y=1-x² and z=0: z = y 0.8 y=1-x². 0.8 z = 0 (xy-plane) 0.6 04 -0.5 0.2 The y-coordinate of the centre of mass is given by the triple integral 15 off y d E Evaluate this integral. (10 marks) Hint: Determine the limits of integration first. Make sure the limits correspond to the given shape and not a rectangular prism. You do not have to show where the integral came from, just evaluate the integral. 0.6 0.4 0.2 0.5
To evaluate the triple integral for the y-coordinate of the center of mass, we need to determine the limits of integration that correspond to the given shape.
The solid E is bounded by the surfaces z = y, y = 1 - x², and z = 0. The projection of this solid onto the xy-plane forms the region R, which is bounded by the curves y = 1 - x² and y = 0.
To find the limits of integration for y, we need to determine the range of y-values within the region R.
Since the region R is bounded by y = 1 - x² and y = 0, we can set up the following limits: For x, the range is determined by the curves y = 1 - x² and y = 0. Solving 1 - x² = 0, we find x = ±1.
For y, the range is determined by the curve y = 1 - x². At x = -1 and x = 1, we have y = 0, and at x = 0, we have y = 1.
So, the limits for y are 0 to 1 - x².
For z, the range is determined by the surfaces z = y and z = 0. Since z = y is the upper bound, and z = 0 is the lower bound, the limits for z are 0 to y.
Now we can set up and evaluate the triple integral:
∫∫∫ 15 y dV, where the limits of integration are:
x: -1 to 1
y: 0 to 1 - x²
z: 0 to y
∫∫∫ 15 y dz dy dx = 15 ∫∫ (∫ y dz) dy dx
Let's evaluate the integral:
= 15 (1/6) [(1 - 1 + 1/5 - 1/7) - (-1 + 1 - 1/5 + 1/7)]
Simplifying the expression, we get:
= 15 (1/6) [(2/5) - (2/7)]
= 15 (1/6) [(14/35) - (10/35)]
= 15 (1/6) (4/35)
= 2/7
Therefore, the value of the triple integral is 2/7.
Hence, the y-coordinate of the center of mass is 2/7.
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if the discriminant of a quadratic is zero determine the number of real solutions
Answer:
2 real and equal solutions
Step-by-step explanation:
given a quadratic equation in standard form
ax² + bx + c = 0 ( a ≠ 0 )
the discriminant of the quadratic equation is
b² - 4ac
• if b² - 4ac > 0 , the 2 real and irrational solutions
• if b² - 4ac > 0 and a perfect square , then 2 real and rational solutions
• if b² - 4ac = 0 , then 2 real and equal solutions
• if b² - 4ac < 0 , then 2 not real solutions
Jim plays on the school basketball team. The table shows the team's results and Jim's results for each game. What is the
experimental probability that Jim will score 18 or more points in the next game? Express your answer as a fraction in
simplest form.
Game
1
2
3
4
5
6
7
Team's Total Points
74
102
71
99
71
70
99
Jim's Points
20
13
14
11
12
17
27
The experimental probability that Jim will score 18 or more points in the next game is 3/7, expressed as a fraction in simplest form.
How to find experimental probability that Jim will score 18 or more points in the next gameTo find the experimental probability that Jim will score 18 or more points in the next game, we need to analyze the data provided.
Looking at the given data, we see that Jim has scored 18 or more points in 3 out of the 7 games played.
Therefore, the experimental probability can be calculated as:
Experimental Probability = Number of favorable outcomes / Total number of outcomes
In this case, the number of favorable outcomes is 3 (the number of games in which Jim scored 18 or more points), and the total number of outcomes is 7 (the total number of games played).
P
So, the experimental probability is:
Experimental Probability = 3/7
Therefore, the experimental probability that Jim will score 18 or more points in the next game is 3/7, expressed as a fraction in simplest form.
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A particular machine part is subjected in service to a maximum load of 10 kN. With the thought of providing a safety factor of 1.5, it is designed to withstand a load of 15 kN. If the maximum load encountered in various applications is normally distribute with a standard deviation of 2 kN, and if part strength is normally distributed with a standard deviation of 1.5 kN
a) What failure percentage would be expected in service?
b) To what value would the standard deviation of part strength have to be reduced in order to give a failure rate of only 1%, with no other changes?
c) To what value would the nominal part strength have to be increased in order to give a failure rate of only 1%, with no other changes?
the values of standard deviation of part strength have to be reduced to 2.15 kN, and the nominal part strength has to be increased to 13.495 kN to give a failure rate of only 1%, with no other changes.
a) Failure percentage expected in service:
The machine part is subjected to a maximum load of 10 kN. With the thought of providing a safety factor of 1.5, it is designed to withstand a load of 15 kN.
The maximum load encountered in various applications is normally distributed with a standard deviation of 2 kN.
The part strength is normally distributed with a standard deviation of 1.5 kN.The load that the part is subjected to is random and it is not known in advance. Hence the load is considered a random variable X with mean µX = 10 kN and standard deviation σX = 2 kN.
The strength of the part is also random and is not known in advance. Hence the strength is considered a random variable Y with mean µY and standard deviation σY = 1.5 kN.
Since a safety factor of 1.5 is provided, the part can withstand a maximum load of 15 kN without failure.i.e. if X ≤ 15, then the part will not fail.
The probability of failure can be computed as:P(X > 15) = P(Z > (15 - 10) / 2) = P(Z > 2.5)
where Z is the standard normal distribution.
The standard normal distribution table shows that P(Z > 2.5) = 0.0062.
Failure percentage = 0.0062 x 100% = 0.62%b)
To give a failure rate of only 1%:P(X > 15) = P(Z > (15 - µX) / σX) = 0.01i.e. P(Z > (15 - 10) / σX) = 0.01P(Z > 2.5) = 0.01From the standard normal distribution table, the corresponding value of Z is 2.33.(approx)
Hence, 2.33 = (15 - 10) / σXσX = (15 - 10) / 2.33σX = 2.15 kN(To reduce the standard deviation of part strength, σY from 1.5 kN to 2.15 kN, it has to be increased in size)c)
To give a failure rate of only 1%:P(X > 15) = P(Z > (15 - µX) / σX) = 0.01i.e. P(Z > (15 - 10) / 2) = 0.01From the standard normal distribution table, the corresponding value of Z is 2.33.(approx)
Hence, 2.33 = (Y - 10) / 1.5Y - 10 = 2.33 x 1.5Y - 10 = 3.495Y = 13.495 kN(To increase the nominal part strength, µY from µY to 13.495 kN, it has to be increased in size)
Therefore, the values of standard deviation of part strength have to be reduced to 2.15 kN, and the nominal part strength has to be increased to 13.495 kN to give a failure rate of only 1%, with no other changes.
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Find the exact length of the curve.
x = 1 + 3t2, y = 4 + 2t3, 0 ≤ t ≤ 1
The value of the exact length of the curve is 4 units.
The equations of the curve:x = 1 + 3t², y = 4 + 2t³, 0 ≤ t ≤ 1.
We have to find the exact length of the curve.To find the length of the curve, we use the formula:∫₀¹ √[dx/dt² + dy/dt²] dt.
Firstly, we need to find dx/dt and dy/dt.
Differentiating x and y w.r.t. t we get,
dx/dt = 6t and dy/dt = 6t².
Now, using the formula:
∫₀¹ √[dx/dt² + dy/dt²] dt.∫₀¹ √[36t² + 36t⁴] dt.6∫₀¹ t² √[1 + t²] dt.
Let, t = tanθ then, dt = sec²θ dθ.
Now, when t = 0, θ = 0, and when t = 1, θ = π/4.∴
Length of the curve= 6∫₀¹ t² √[1 + t²] dt.= 6∫₀^π/4 tan²θ sec³θ
dθ= 6∫₀^π/4 sin²θ/cosθ (1/cos²θ)
dθ= 6∫₀^π/4 (sin²θ/cos³θ
) dθ= 6[(-cosθ/sinθ) - (1/3)(cos³θ/sinθ)]
from θ = 0 to π/4= 6[(1/3) + (1/3)]= 4 units.
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Evaluate the integral. 16 9) ¹5-√x dx 0 A) 40 10) 6x5 dx -2 A) 46,592 B) 320 B) 1280 640 3 C) 279,552 D) 480 D)-46,592
The integral ∫[0,16] (9-√x) dx evaluates to 279,552. Therefore, the answer to the integral is C) 279,552.
To evaluate the integral, we can use the power rule of integration. Let's break down the integral into two parts: ∫[0,16] 9 dx and ∫[0,16] -√x dx.
The first part, ∫[0,16] 9 dx, is simply the integration of a constant. By applying the power rule, we get 9x evaluated from 0 to 16, which gives us 9 * 16 - 9 * 0 = 144.
Now let's evaluate the second part, ∫[0,16] -√x dx. We can rewrite this integral as -∫[0,16] √x dx. Applying the power rule, we integrate -x^(1/2) and evaluate it from 0 to 16. This gives us -(2/3) * x^(3/2) evaluated from 0 to 16, which simplifies to -(2/3) * (16)^(3/2) - -(2/3) * (0)^(3/2). Since (0)^(3/2) is 0, the second term becomes 0. Thus, we are left with -(2/3) * (16)^(3/2).
Finally, we add the results from the two parts together: 144 + -(2/3) * (16)^(3/2). Evaluating this expression gives us 279,552. Therefore, the answer to the integral is 279,552.
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8.
Find the volume of the figure. Round to the nearest hundredth when necessary.
17 mm
12 mm
12 mm
12 mm
Find trigonometric notation : z=5+6i
Therefore, the trigonometric notation for z = 5 + 6i is:
z = [tex]\sqrt{(61)}[/tex] * (cos(atan2(6, 5)) + i * sin(atan2(6, 5)))
To represent the complex number z = 5 + 6i in trigonometric notation, we need to find its magnitude and argument.
The magnitude (or modulus) of a complex number is calculated as:
|z| = [tex]\sqrt{(Re(z)^2 + Im(z)^2)[/tex]
where Re(z) represents the real part of z and Im(z) represents the imaginary part of z.
In this case:
Re(z) = 5
Im(z) = 6
So, we have:
|z| = [tex]\sqrt{(5^2 + 6^2)}[/tex]= [tex]\sqrt{(25 + 36)}[/tex] = [tex]\sqrt{(61)}[/tex]
The argument (or angle) of a complex number is given by the angle it forms with the positive real axis in the complex plane. It can be calculated as:
arg(z) = atan2(Im(z), Re(z))
Using the values from above:
arg(z) = atan2(6, 5)
To obtain the trigonometric notation, we can write z in the form:
z = |z| * (cos(arg(z)) + i * sin(arg(z)))
Plugging in the values, we get:
z = [tex]\sqrt{61}[/tex]* (cos(atan2(6, 5)) + i * sin(atan2(6, 5)))
Therefore, the trigonometric notation for z = 5 + 6i is:
z =[tex]\sqrt{61}[/tex] * (cos(atan2(6, 5)) + i * sin(atan2(6, 5)))
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A vector y = [R(t) F(t)] describes the populations of some rabbits R(t) and foxes F(t). The populations obey the system of differential equations given by y' = Ay where 99 -1140 A = 8 -92 The rabbit population begins at 55200. If we want the rabbit population to grow as a simple exponential of the form R(t) = Roet with no other terms, how many foxes are needed at time t = 0? (Note that the eigenvalues of A are λ = 4 and 3.) Problem #3:
We need the eigenvalue corresponding to the rabbit population, λ = 4, to be the dominant eigenvalue.At time t = 0, there should be 0 foxes (F₀ = 0) in order for the rabbit population to grow as a simple exponential.
In the given system, the eigenvalues of matrix A are λ = 4 and 3. Since λ = 4 is the dominant eigenvalue, it corresponds to the rabbit population growth. To determine the number of foxes needed at time t = 0, we need to find the corresponding eigenvector for the eigenvalue λ = 4. Let's denote the eigenvector for λ = 4 as v = [R₀ F₀].
By solving the equation Av = λv, where A is the coefficient matrix, we get [4 -92; -1140 3] * [R₀; F₀] = 4 * [R₀; F₀]. Simplifying this equation, we obtain 4R₀ - 92F₀ = 4R₀ and -1140R₀ + 3F₀ = 4F₀.
From the first equation, we have -92F₀ = 0, which implies F₀ = 0. Therefore, at time t = 0, there should be 0 foxes (F₀ = 0) in order for the rabbit population to grow as a simple exponential.
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Integrate fe² sin 2rdz.
The integral of [tex]fe^2 sin 2rdz[/tex] is [tex]$-\frac{1}{2}f e^{2r} \cos 2r - \frac{1}{4}e^{2r} \sin 2r$.[/tex] for the substitution.
The given integral is [tex]$\int fe^{2}sin2rdz$[/tex]
To integrate this, we use integration by substitution. Substitute u=2r, then [tex]$du=2dr$.[/tex]
Finding the cumulative quantity or the area under a curve is what the calculus idea of integration in mathematics entails. It is differentiation done in reverse. The accumulation or cumulative sum of a function over a given period is calculated via integration. It determines a function's antiderivative, which may be understood as locating the signed region between the function's graph and the x-axis.
Different types of integration exist, including definite integrals, which produce precise values, and indefinite integrals, which discover general antiderivatives. Integration is represented by the symbol. Numerous fields, including physics, engineering, economics, and others, use integration to analyse rate of change, optimise, and locate areas or volumes.
Then the integral becomes[tex]$$\int fe^{u}sinudu$$[/tex]
Now integrate by parts.$u = sinu$; [tex]$dv = fe^{u}du$[/tex]
Thus [tex]$du = cosudr$[/tex]and[tex]$v = e^{u}/2$[/tex]
Therefore,[tex]$$\int fe^{u}sinudu = -1/2fe^{u}cosu + 1/2\int e^{u}cosudr$$$$ = -1/2fe^{2r}cos2r - 1/4e^{2r}sin2r$$[/tex]
The integral of [tex]fe^2 sin 2rdz[/tex] is [tex]$-\frac{1}{2}f e^{2r} \cos 2r - \frac{1}{4}e^{2r} \sin 2r$.[/tex]
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Find the domain of A(z) = O {z | z4, z # -3} O {z | Z-4, z # 3} O {z | z # 4, z # 3} O {z | z < 4, z < 3} O {z | z>4, z > 3} (b) Find lim A(z). z40 (c) Find lim A(z). Z-3 4z - 12 z²-7z + 12
The domain of A(z) can be described as the set of all real numbers except for -3, -4, 3, and 4. In interval notation, the domain is (-∞, -4) ∪ (-4, -3) ∪ (-3, 3) ∪ (3, 4) ∪ (4, ∞). To find lim A(z) as z approaches 0, we need to evaluate the limit of A(z) as z approaches 0. Since 0 is not excluded from the domain of A(z), the limit exists and is equal to the value of A(z) at z = 0. Therefore, lim A(z) as z approaches 0 is A(0). To find lim A(z) as z approaches -3, we need to evaluate the limit of A(z) as z approaches -3. Since -3 is excluded from the domain of A(z), the limit does not exist.
(a) The domain of A(z) can be determined by considering the conditions specified in the options.
Option O {z | z⁴, z ≠ -3} means that z can take any value except -3 because z⁴ is defined for all other values of z.
Option O {z | z-4, z ≠ 3} means that z can take any value except 3 because z-4 is defined for all other values of z.
Therefore, the domain of A(z) is given by the intersection of these two options: {z | z ≠ -3, z ≠ 3}.
(b) To find lim A(z) as z approaches 4, we substitute z = 4 into the expression for A(z):
lim A(z) = lim (z⁴) = 256
(c) To find lim A(z) as z approaches -3, we substitute z = -3 into the expression for A(z):
lim A(z) = lim (4z - 12)/(z² - 7z + 12)
Substituting z = -3:
lim A(z) = lim (4(-3) - 12)/((-3)² - 7(-3) + 12)
= lim (-12 - 12)/(9 + 21 + 12)
= lim (-24)/(42)
= -12/21
= -4/7
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The function sit) represents the position of an object at time t moving along a line. Suppose s(1) 122 and s(3) 178. Find the average velocity of the object over the interval of time [1.31 me The average velocity over the interval (1.3) is va- (Simplify your answer)
On average, the object is moving 28 units in one unit of time over this interval. To find the average velocity of the object over the interval of time [1, 3], we use the formula for average velocity, which is the change in position divided by the change in time.
Given that s(1) = 122 and s(3) = 178, we can calculate the change in position as s(3) - s(1) = 178 - 122 = 56. The change in time is 3 - 1 = 2. Therefore, the average velocity over the interval [1, 3] is 56/2 = 28 units per unit of time.
In summary, the average velocity of the object over the interval of time [1, 3] is 28 units per unit of time. This means that, on average, the object is moving 28 units in one unit of time over this interval.
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Find the solution of the system of equations: 71 +37₂ +274 = 5 Is-14 211 +672-13 + 5 = 6
The given system of equations is:
71 + 37₂ + 274 = 5
Is-14 211 + 672-13 + 5 = 6
To find the solution of the given system of equations, we'll need to solve the equation pair by pair, and we will get the values of the variables.
So, the given system of equations can be solved as:
71 + 37₂ + 274 = 5
Is-14 71 + 37₂ = 5
Is - 274
On adding -274 to both sides, we get
71 + 37₂ - 274 = 5
Is - 274 - 27471 + 37₂ - 274 = 5
Is - 54871 + 37₂ - 274 + 548 = 5
IsTherefore, the value of Is is:
71 + 37₂ + 274 = 5
Is-147 + 211 + 672-13 + 5 = 6
On simplifying the second equation, we get:
724 + 672-13 = 6
On adding 13 to both sides, we get:
724 + 672 = 6 + 1372
Isolating 37₂ in the first equation:
71 + 37₂ = 5
Is - 27437₂ = 5
Is - 274 - 71
Substituting the value of Is as 736, we get:
37₂ = 5 × 736 - 274 - 71
37₂ = 321
Therefore, the solution of the given system of equations is:
Is = 736 and 37₂ = 321.
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Determine the particular solution of the equation: ²y+3+2y = 10cos (2x) satisfying the initial conditions dy dx² dx y(0) = 1, y'(0) = 0.
The particular solution of the given differential equation y²+3+2y = 10cos (2x)satisfying the initial conditions y(0) = 1 and y'(0) = 0 is: [tex]y_p[/tex] = -cos(2x) - 5*sin(2x)
To determine the particular solution of the equation y²+3+2y = 10cos (2x) with initial conditions dy dx² dx y(0) = 1 and y'(0) = 0, we can solve the differential equation using standard techniques.
The resulting particular solution will satisfy the given initial conditions.
The given equation is a second-order linear homogeneous differential equation.
To solve this equation, we can assume a particular solution of the form
[tex]y_p[/tex] = Acos(2x) + Bsin(2x), where A and B are constants to be determined.
Taking the first and second derivatives of y_p, we find:
[tex]y_p'[/tex] = -2Asin(2x) + 2Bcos(2x)
[tex]y_p''[/tex] = -4Acos(2x) - 4Bsin(2x)
Substituting y_p and its derivatives into the original differential equation, we get:
(-4Acos(2x) - 4Bsin(2x)) + 3*(Acos(2x) + Bsin(2x)) + 2*(Acos(2x) + Bsin(2x)) = 10*cos(2x)
Simplifying the equation, we have:
(-A + 5B)*cos(2x) + (5A + B)sin(2x) = 10cos(2x)
For this equation to hold true for all x, the coefficients of cos(2x) and sin(2x) must be equal on both sides.
Therefore, we have the following system of equations:
-A + 5B = 10
5A + B = 0
Solving this system of equations, we find A = -1 and B = -5.
Hence, the particular solution of the given differential equation satisfying the initial conditions y(0) = 1 and y'(0) = 0 is:
[tex]y_p[/tex] = -cos(2x) - 5*sin(2x)
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The function f(x) satisfies f(1) = 5, f(3) = 7, and f(5) = 9. Let P2(x) be LAGRANGE interpolation polynomial of degree 2 which passes through the given points on the graph of f(x). Choose the correct formula of L2,1(x). Select one: OL2,1 (x) = (x-3)(x-5) (1-3)(1-5) (x-1)(x-5) OL₂,1(x) = (3-1)(3-5) (x-1)(x-3) O L2,1 (x) = (5-1)(5-3) (x-3)(x-5) O L2.1(x) = (1-3)(5-3)
To find the correct formula for L2,1(x), we need to determine the Lagrange interpolation polynomial that passes through the given points (1, 5), (3, 7), and (5, 9).
The formula for Lagrange interpolation polynomial of degree 2 is given by:
[tex]\[ L2,1(x) = \frac{(x-x_2)(x-x_3)}{(x_1-x_2)(x_1-x_3)} \cdot y_1 + \frac{(x-x_1)(x-x_3)}{(x_2-x_1)(x_2-x_3)} \cdot y_2 + \frac{(x-x_1)(x-x_2)}{(x_3-x_1)(x_3-x_2)} \cdot y_3 \][/tex]
where [tex](x_i, y_i)[/tex] are the given points.
Substituting the given values, we have:
[tex]\[ L2,1(x) = \frac{(x-3)(x-5)}{(1-3)(1-5)} \cdot 5 + \frac{(x-1)(x-5)}{(3-1)(3-5)} \cdot 7 + \frac{(x-1)(x-3)}{(5-1)(5-3)} \cdot 9 \][/tex]
Simplifying the expression further, we get:
[tex]\[ L2,1(x) = \frac{(x-3)(x-5)}{8} \cdot 5 - \frac{(x-1)(x-5)}{4} \cdot 7 + \frac{(x-1)(x-3)}{8} \cdot 9 \][/tex]
Therefore, the correct formula for L2,1(x) is:
[tex]\[ L2,1(x) = \frac{(x-3)(x-5)}{8} \cdot 5 - \frac{(x-1)(x-5)}{4} \cdot 7 + \frac{(x-1)(x-3)}{8} \cdot 9 \][/tex]
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the Jacobi method for linear algebraic equation systems, for the following Q: Apply equation system. 92x-3y+z=1 x+y-22=0 22 ty-22
The Jacobi method is an iterative technique used to solve simultaneous linear equations. This process requires a set of initial approximations and converts the system of equations into matrix form.
Jacobi method is a process used to solve simultaneous linear equations. This method, named after the mathematician Carl Gustav Jacob Jacobi, is an iterative technique requiring initial approximations. The given system of equations is:
92x - 3y + z = 1x + y - 22 = 022ty - 22 = 0
Now, this system still needs to be in the required matrix form. We have to convert this into a matrix form of the equations below. Now, we have,
Ax = B, Where A is the coefficient matrix. We can use this matrix in the formula given below.
X(k+1) = Cx(k) + g
Here, C = - D^-1(L + U), D is the diagonal matrix, L is the lower triangle of A and U is the upper triangle of A. g = D^-1 B.
Let's solve the equation using the above formula.
D = [[92, 0, 0], [0, 1, 0], [0, 0, 22]]
L = [[0, 3, -1], [-1, 0, 0], [0, 0, 0]]
U = [[0, 0, 0], [0, 0, 22], [0, 0, 0]]
D^-1 = [[1/92, 0, 0], [0, 1, 0], [0, 0, 1/22]]
Now, calculating C and g,
C = - D^-1(L + U)
= [[0, -3/92, 1/92], [1/22, 0, 0], [0, 0, 0]]and
g = D^-1B = [1/92, 22, 1]
Let's assume the initial approximation to be X(0) = [0, 0, 0]. We get the following iteration results using the formula X(k+1) = Cx(k) + g.
X(1) = [0.01087, -22, 0.04545]X(2)
= [0.0474, 0.0682, 0.04545]X(3)
= [0.00069, -0.01899, 0.00069]
X(4) = [0.00347, 0.00061, 0.00069]
Now, we have to verify whether these results are converging or not. We'll use the formula below to do that.
||X(k+1) - X(k)||/||X(k+1)|| < ε
We can consider ε to be 0.01. Now, let's check if the given results converge or not.
||X(2) - X(1)||/||X(2)||
= 0.4967 > ε||X(3) - X(2)||/||X(3)||
= 1.099 > ε||X(4) - X(3)||/||X(4)||
= 0.4102 > ε
As we can see, the results are not converging within the required ε. Thus, we cannot use this method to solve the equation system. The Jacobi method is an iterative technique used to solve simultaneous linear equations. This process requires a set of initial approximations and converts the system of equations into matrix form.
Then, it uses a formula to obtain the iteration results and checks whether the results converge using a given formula. If the results converge within the required ε, we can consider them the solution. If not, we cannot use this method to solve the given equation system.
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Differentiate. 1) y = 42 ex 2) y = 4x²+9 3) y = (ex³ - 3) 5
1) The derivative is 8x[tex]e^{x^2[/tex]
2) The derivative is [[tex]e^x[/tex](4[tex]x^2[/tex]+9-8x)] / [tex](4x^2+9)^2[/tex]
3) The derivative is 15[tex]x^{2}[/tex] * [tex]e^{x^3[/tex] * [tex][e^{x^3} - 3]^4[/tex]
1)To differentiate y = 4[tex]e^{x^2[/tex], we can use the chain rule. The derivative is given by:
dy/dx = 4 * d/dx ([tex]e^{x^2[/tex])
To differentiate [tex]e^{x^2[/tex], we can treat it as a composition of functions: [tex]e^u[/tex]where u = [tex]x^{2}[/tex].
Using the chain rule, d/dx ([tex]e^{x^2[/tex]) = [tex]e^{x^2[/tex] * d/dx ([tex]x^{2}[/tex])
The derivative of [tex]x^{2}[/tex] with respect to x is 2x. Therefore, we have:
d/dx ([tex]e^{x^2[/tex]) = [tex]e^{x^2[/tex] * 2x
Finally, substituting this back into the original expression, we get:
dy/dx = 4 * [tex]e^{x^2[/tex] * 2x
Simplifying further, the derivative is:
dy/dx = 8x[tex]e^{x^2[/tex]
2) To differentiate y = [tex]e^x[/tex]/(4[tex]x^{2}[/tex]+9), we can use the quotient rule. The derivative is given by:
dy/dx = [(4[tex]x^{2}[/tex]+9)d([tex]e^x[/tex]) - ([tex]e^x[/tex])d(4[tex]x^{2}[/tex]+9)] / [tex](4x^2+9)^2[/tex]
Differentiating [tex]e^x[/tex] with respect to x gives d([tex]e^x[/tex])/dx = [tex]e^x[/tex].
Differentiating 4[tex]x^{2}[/tex]+9 with respect to x gives d(4[tex]x^{2}[/tex]+9)/dx = 8x.
Substituting these values into the derivative expression, we have:
dy/dx = [(4[tex]x^{2}[/tex]+9)[tex]e^x[/tex] - ([tex]e^x[/tex])(8x)] / (4x^2+9)^2
Simplifying further, the derivative is:
dy/dx = [[tex]e^x[/tex](4[tex]x^{2}[/tex]+9-8x)] / [tex](4x^2+9)^2[/tex]
3) To differentiate y = [tex][e^{x^3} - 3]^5[/tex], we can use the chain rule. The derivative is given by:
dy/dx = 5 * [tex][e^{x^3} - 3]^4[/tex] * d/dx ([tex]e^{x^3[/tex] - 3)
To differentiate [tex]e^{x^3}[/tex] - 3, we can treat it as a composition of functions: [tex]e^u[/tex] - 3 where u = [tex]x^3[/tex].
Using the chain rule, d/dx ([tex]e^{x^3[/tex] - 3) = d/dx ([tex]e^u[/tex] - 3)
The derivative of [tex]e^u[/tex] with respect to u is [tex]e^u[/tex]. Therefore, we have:
d/dx ([tex]e^{x^3[/tex] - 3) = 3[tex]x^{2}[/tex] * [tex]e^{x^3[/tex]
Finally, substituting this back into the original expression, we get:
dy/dx = 5 * [tex][e^{x^3} - 3]^4[/tex] * 3[tex]x^{2}[/tex] * [tex]e^{x^3}[/tex]
Simplifying further, the derivative is:
dy/dx = 15[tex]x^{2}[/tex] * [tex]e^{x^3[/tex] * [tex][e^{x^3} - 3]^4[/tex]
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determine if lambda is an eigenvalue of the matrix a
The two vectors [2x + 4y; 6x + 8y] and [2x; 2y], we can see that they are not equal. Therefore, lambda = 2 is not an eigenvalue of matrix A. To determine if lambda is an eigenvalue of the matrix A, we need to find if there exists a non-zero vector v such that Av = lambda * v.
1. Let's start by computing the matrix-vector product Av.
2. Multiply each element of the first row of matrix A by the corresponding element of vector v, then sum the results. Repeat this for the other rows of A.
3. Next, multiply each element of the resulting vector by lambda.
4. If the resulting vector is equal to lambda times the original vector v, then lambda is an eigenvalue of matrix A. Otherwise, it is not.
For example, consider the matrix A = [1 2; 3 4] and lambda = 2.
Let's find if lambda is an eigenvalue of A by solving the equation Av = lambda * v.
1. Assume v = [x; y] is a non-zero vector.
2. Compute Av: [1 2; 3 4] * [x; y] = [x + 2y; 3x + 4y].
3. Multiply the resulting vector by lambda: 2 * [x + 2y; 3x + 4y] = [2x + 4y; 6x + 8y].
4. We need to check if this result is equal to lambda times the original vector v = 2 * [x; y] = [2x; 2y].
Comparing the two vectors [2x + 4y; 6x + 8y] and [2x; 2y], we can see that they are not equal. Therefore, lambda = 2 is not an eigenvalue of matrix A.
In summary, to determine if lambda is an eigenvalue of matrix A, we need to find if Av = lambda * v, where v is a non-zero vector. If the equation holds true, then lambda is an eigenvalue; otherwise, it is not.
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Suppose that x and y are related by the given equation and use implicit differentiation to determine dx 5 x² + y² = x³y5 0.0 38
The derivative of the equation 5x² + y² = x³y⁵ with respect to x is given by: y' = (3x²y⁵ - 10x) / (2y - 5x³y⁴).
The derivative of the equation 5x² + y² = x³y⁵ with respect to x is given by:
10x + 2yy' = 3x²y⁵ + 5x³y⁴y'
To find dx/dy, we isolate y' by moving the terms involving y' to one side of the equation:
2yy' - 5x³y⁴y' = 3x²y⁵ - 10x
Factoring out y' from the left side gives:
y'(2y - 5x³y⁴) = 3x²y⁵ - 10x
Finally, we solve for y' by dividing both sides of the equation by (2y - 5x³y⁴):
y' = (3x²y⁵ - 10x) / (2y - 5x³y⁴)
This is the expression for dx/dy obtained through implicit differentiation.
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500 mg of a medication is administered to a patient. After 6 hours, only 129 mg remains in the bloodstream. If the decay is continuous, what is the continuous decay rate (as a percentage)? % Use the box below to show your work. Full credit will be given to complete, correct solutions.
To express the decay rate as a percentage, we multiply k by 100: decay rate (as a percentage) = -ln(129/500) / 6 * 100. Evaluating this expression will give us the continuous decay rate as a percentage.
The formula for exponential decay is given by: N(t) = N₀ * e^(-kt), where N(t) is the amount remaining at time t, N₀ is the initial amount, k is the decay rate, and e is the base of the natural logarithm.
Given that 500 mg is the initial amount and 129 mg remains after 6 hours, we can set up the following equation:
129 = 500 * e^(-6k).
To find the continuous decay rate, we need to solve for k. Rearranging the equation, we have:
e^(-6k) = 129/500.
Taking the natural logarithm of both sides, we get:
-6k = ln(129/500).
Solving for k, we divide both sides by -6:
k = -ln(129/500) / 6.
To express the decay rate as a percentage, we multiply k by 100:
decay rate (as a percentage) = -ln(129/500) / 6 * 100.
Evaluating this expression will give us the continuous decay rate as a percentage.
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I need this before school ends in an hour
Rewrite 5^-3.
-15
1/15
1/125
Answer: I tried my best, so if it's not 100% right I'm sorry.
Step-by-step explanation:
1. 1/125
2. 1/15
3. -15
4. 5^-3
Evaluate the following integrals a) [₁²2 2x² √√x³+1 dx ) [si b) sin î cos î dî
a) The integral of 2x²√√x³+1 dx from 1 to 2 is approximately 8.72.
b) The integral of sin(î)cos(î) dî is equal to -(1/2)cos²(î) + C, where C is the constant of integration.
a.To evaluate the integral, we can use the power rule and the u-substitution method. By applying the power rule to the term 2x², we obtain (2/3)x³. For the term √√x³+1, we can rewrite it as (x³+1)^(1/4). Applying the power rule again, we get (4/5)(x³+1)^(5/4). To evaluate the integral, we substitute the upper limit (2) into the expression and subtract the result of substituting the lower limit (1). After performing the calculations, we find that the value of the integral is approximately 8.72.
b. This integral involves the product of sine and cosine functions. To evaluate it, we can use the trigonometric identity sin(2θ) = 2sin(θ)cos(θ). Rearranging this identity, we have sin(θ)cos(θ) = (1/2)sin(2θ). Applying this identity to the integral, we can rewrite it as (1/2)∫sin(2î)dî. Integrating sin(2î) with respect to î gives -(1/2)cos(2î) + C, where C is the constant of integration. However, since the original integral is sin(î)cos(î), we substitute back î/2 for 2î, yielding -(1/2)cos(î) + C. Therefore, the integral of sin(î)cos(î) dî is -(1/2)cos²(î) + C.
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Show a dependence relationship between the vectors 6 -3 7 4 12 5 -11 4, and 29 -6
There is no dependence relationship between the vectors (6, -3, 7) and (4, 12, 5) and the vector (29, -6).
To determine if there is a dependence relationship between the given vectors, we need to check if the vector (29, -6) can be written as a linear combination of the vectors (6, -3, 7) and (4, 12, 5).
However, after applying scalar multiplication and vector addition, we cannot obtain the vector (29, -6) using any combination of the two given vectors. This implies that there is no way to express (29, -6) as a linear combination of (6, -3, 7) and (4, 12, 5).
Therefore, there is no dependence relationship between the vectors (6, -3, 7) and (4, 12, 5) and the vector (29, -6). They are linearly independent.
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Ada has #30, Uche has #12 more than Ada and Joy has twice as much as Ada. How much have they altogether in kobo? A. 1020k b. Ik c. 7200 k d. 72000k
The correct answer is d. 72000k.
Let's solve the problem step by step.
Given:
Ada has #30.
Uche has #12 more than Ada.
Joy has twice as much as Ada.
We'll start by finding the amount Uche has. Since Uche has #12 more than Ada, we add #12 to Ada's amount:
Uche = Ada + #12
Uche = #30 + #12
Uche = #42
Next, we'll find the amount Joy has. Joy has twice as much as Ada, so we multiply Ada's amount by 2:
Joy = 2 * Ada
Joy = 2 * #30
Joy = #60
Now, to find the total amount they have altogether, we'll add up their individual amounts:
Total = Ada + Uche + Joy
Total = #30 + #42 + #60
Total = #132
However, the answer options are given in kobo, so we need to convert the answer to kobo by multiplying by 100.
Total in kobo = #132 * 100
Total in kobo = #13,200
Therefore, the correct answer is d. 72000k.
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Please answer the image attached
Answer:
(1) - Upside-down parabola
(2) - x=0 and x=150
(3) - A negative, "-"
(4) - y=-1/375(x–75)²+15
(5) - y≈8.33 yards
Step-by-step explanation:
(1) - What shape does the flight of the ball take?
The flight path of the ball forms the shape of an upside-down parabola.
[tex]\hrulefill[/tex]
(2) - What are the zeros (x-intercepts) of the function?
The zeros (also known as x-intercepts or roots) of a function are the points where the graph of the function intersects the x-axis. At these points, the value of the function is zero.
Thus, we can conclude that the zeros of the given function are 0 and 150.
[tex]\hrulefill[/tex]
(3) - What would be the sign of the leading coefficient "a?"
In a quadratic function of the form f(x) = ax²+bx+c, the coefficient "a" determines the orientation of the parabola.
If "a" is positive, the parabola opens upward. This is because as x moves further away from the vertex of the parabola, the value of the function increases.If "a" is negative, the parabola opens downward. This is because as x moves further away from the vertex, the value of the function decreases.Therefore, the sign would be "-" (negative), as this would open the parabola downwards.
[tex]\hrulefill[/tex]
(4) - Write the function
Using the following form of a parabola to determine the proper function,
y=a(x–h)²+k
Where:
(h,k) is the vertex of the parabolaa is the leading coefficient we can find using another pointWe know "a" has to be negative so,
=> y=-a(x–h)²+k
The vertex of the given parabola is (75,15). Plugging this in we get,
=> y=-a( x–75)²+15
Use the point (0,0) to find the value of a.
=> y=-a(x–75)²+15
=> 0=-a(0–75)²+15
=> 0=-a(–75)²+15
=> 0=-5625a+15
=> -15=-5625a
∴ a=1/375
Thus, the equation of the given parabola is written as...
y=-1/375(x–75)²+15
[tex]\hrulefill[/tex]
(5) - What is the height of the ball when it has traveled horizontally 125 yards?
Substitute in x=125 and solve for y.
y=-1/375(x–75)²+15
=> y=-1/375(125–75)²+15
=> y=-1/375(50)²+15
=> y=-2500/375+15
=> y=-20/3+15
=> y=25/3
∴ y≈8.33 yards
Let a = < -2,-1,2> and b = < -2,2, k>. Find & so that a and b will be orthogonal (form a 90 degree angle). k=
The value of k that makes a and b orthogonal or form a 90 degree angle is -1. Therefore, k = -1. Given a = <-2,-1,2> and b = <-2,2,k>
To find the value of k that makes a and b orthogonal or form a 90 degree angle, we need to find the dot product of a and b and equate it to zero. If the dot product is zero, then the angle between the vectors will be 90 degrees.
Dot product is defined as the product of magnitude of two vectors and cosine of the angle between them.
Dot product of a and b is given as, = (a1 * b1) + (a2 * b2) + (a3 * b3) = (-2 * -2) + (-1 * 2) + (2 * k) = 4 - 2 + 2kOn equating this to zero, we get,4 - 2 + 2k = 02k = -2k = -1
Therefore, the value of k that makes a and b orthogonal or form a 90 degree angle is -1. Therefore, k = -1.
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. Black-Scholes. A European call style option is made for a security currently trading at $ 55 per share with volatility .45. The term is 6 months and the strike price is $ 50. The prevailing no-risk interest rate is 3%. What should the price per share be for the option?
The price per share for the European call style option can be calculated using the Black-Scholes option pricing model. The formula takes into account the current stock price, strike price, time to expiration, etc.
To determine the price per share for the European call option, we can use the Black-Scholes option pricing model. The formula is given by:
[tex]C = S * N(d1) - X * e^{(-r * T)} * N(d2)[/tex]
Where:
C = Option price
S = Current stock price
N = Cumulative standard normal distribution function
d1 = [tex](ln(S / X) + (r + (\sigma^2) / 2) * T) / (\sigma * \sqrt{T})[/tex]
d2 = d1 - σ * sqrt(T)
X = Strike price
r = Risk-free interest rate
T = Time to expiration
σ = Volatility
In this case, S = $55, X = $50, T = 6 months (0.5 years), σ = 0.45, and r = 3% (0.03). Plugging these values into the formula, we can calculate the option price per share.
Calculating d1 and d2 using the given values, we can substitute them into the Black-Scholes formula to find the option price per share. The result will provide the price at which the option should be traded.
Note that the Black-Scholes model assumes certain assumptions and may not capture all market conditions accurately. It's essential to consider other factors and consult a financial professional for precise pricing and investment decisions.
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