a) The smallest zero of f is -7 with multiplicity 2.
The largest zero of f is 1 with multiplicity 1. (Choice B.)
(b) The graph touches the x-axis at x = -7 and crosses at x = 1. (Choice C)
(c) The maximum number of turning points on the graph is 2.
(d) The power function that the graph of f resembles for large values of |x| is y = 2x^3.
(a) To find each real zero and its multiplicity:
set f(x) equal to zero and solve for x:
2(x - 1)(x + 7)^2 = 0
Setting each factor equal to zero separately:
x - 1 = 0 => x = 1 (with multiplicity 1)
x + 7 = 0 => x = -7 (with multiplicity 2)
Therefore, the real zeros and their multiplicities are:
x = 1 (multiplicity 1)
x = -7 (multiplicity 2)
(b) To determine whether the graph crosses or touches the x-axis at each x-intercept, examine the sign changes around those points.
At x = 1, the multiplicity is 1, indicating that the graph crosses the x-axis.
At x = -7, the multiplicity is 2, indicating that the graph touches the x-axis.
(c) The maximum number of turning points on the graph is 2 because the maximum number of turning points on the graph is equal to the degree of the polynomial minus 1
(d) The power function that the graph of f resembles for large values of |x| is y = 2x³because the leading term of f(x) = 2(x - 1)(x + 7)^2 is 2x^3. As x approaches positive or negative infinity, the dominant term is 2x^3, which is a power function with an odd degree.
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By graphing the system of constraints, find the values of x and y that minimize the objective function. x+2y≥8
x≥2
y≥0
minimum for C=x+3y (1 point) (8,0)
(2,3)
(0,10)
(10,0)
The values of x and y that minimize the objective function C = x + 3y are (2,3) (option b).
To find the values of x and y that minimize the objective function, we need to graph the system of constraints and identify the point that satisfies all the constraints while minimizing the objective function C = x + 3y.
The given constraints are:
x + 2y ≥ 8
x ≥ 2
y ≥ 0
The graph is plotted below.
The shaded region above and to the right of the line x = 2 represents the constraint x ≥ 2.
The shaded region above the line x + 2y = 8 represents the constraint x + 2y ≥ 8.
The shaded region above the x-axis represents the constraint y ≥ 0.
To find the values of x and y that minimize the objective function C = x + 3y, we need to identify the point within the feasible region where the objective function is minimized.
From the graph, we can see that the point (2, 3) lies within the feasible region and is the only point where the objective function C = x + 3y is minimized.
Therefore, the values of x and y that minimize the objective function are x = 2 and y = 3.
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If the general solution of a differential equation is \( y(t)=C e^{-3 t}+9 \), what is the solution that satisfies the initial condition \( y(0)=4 \) ? \[ y(t)= \]
The solution that satisfies the initial condition [tex]\(y(0) = 4\)[/tex] for the differential equation is [tex]\(y(t) = -5e^{-3t} + 9\)[/tex].
To find the solution that satisfies the initial condition [tex]\(y(0) = 4\)[/tex] for the differential equation [tex]\(y(t) = Ce^{-3t} + 9\)[/tex], we substitute the initial condition into the general solution and solve for the constant [tex]\(C\)[/tex].
Given: [tex]\(y(t) = Ce^{-3t} + 9\)[/tex]
Substituting [tex]\(t = 0\)[/tex] and [tex]\(y(0) = 4\)[/tex]:
[tex]\[4 = Ce^{-3 \cdot 0} + 9\][/tex]
[tex]\[4 = C + 9\][/tex]
Solving for [tex]\(C\)[/tex]:
[tex]\[C = 4 - 9\][/tex]
[tex]\[C = -5\][/tex]
Now we substitute the value of [tex]\(C\)[/tex] back into the general solution:
[tex]\[y(t) = -5e^{-3t} + 9\][/tex]
Therefore, the solution that satisfies the initial condition [tex]\(y(0) = 4\)[/tex] for the differential equation is:
[tex]\[y(t) = -5e^{-3t} + 9\][/tex]
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Solve the following ODE using both undetermined coefficients and variation of parameters. \[ y^{\prime \prime}-7 y^{\prime}=-3 \]
The general solution is given by [tex]\[y(x) = y_h(x) + y_p(x)\]\[y(x) = c_1 + c_2e^{7x} + Ae^{-7x} + Ce^{7x}\][/tex]
where [tex]\(c_1\), \(c_2\), \(A\), and \(C\)[/tex] are arbitrary constants.
To solve the given second-order ordinary differential equation (ODE), we'll use both the methods of undetermined coefficients and variation of parameters. Let's begin with the method of undetermined coefficients.
**Method of Undetermined Coefficients:**
Step 1: Find the homogeneous solution by setting the right-hand side to zero.
The homogeneous equation is given by:
\[y_h'' - 7y_h' = 0\]
To solve this homogeneous equation, we assume a solution of the form \(y_h = e^{rx}\), where \(r\) is a constant to be determined.
Substituting this assumed solution into the homogeneous equation:
\[r^2e^{rx} - 7re^{rx} = 0\]
\[e^{rx}(r^2 - 7r) = 0\]
Since \(e^{rx}\) is never zero, we must have \(r^2 - 7r = 0\). Solving this quadratic equation gives us two possible values for \(r\):
\[r_1 = 0, \quad r_2 = 7\]
Therefore, the homogeneous solution is:
\[y_h(x) = c_1e^{0x} + c_2e^{7x} = c_1 + c_2e^{7x}\]
Step 2: Find the particular solution using the undetermined coefficients.
The right-hand side of the original equation is \(-3\). Since this is a constant, we assume a particular solution of the form \(y_p = A\), where \(A\) is a constant to be determined.
Substituting \(y_p = A\) into the original equation:
\[0 - 7(0) = -3\]
\[0 = -3\]
The equation is not satisfied, which means the constant solution \(A\) does not work. To overcome this, we introduce a linear term by assuming \(y_p = Ax + B\), where \(A\) and \(B\) are constants to be determined.
Substituting \(y_p = Ax + B\) into the original equation:
\[(2A) - 7(A) = -3\]
\[2A - 7A = -3\]
\[-5A = -3\]
\[A = \frac{3}{5}\]
Therefore, the particular solution is \(y_p(x) = \frac{3}{5}x + B\).
Step 3: Combine the homogeneous and particular solutions.
The general solution is given by:
\[y(x) = y_h(x) + y_p(x)\]
\[y(x) = c_1 + c_2e^{7x} + \frac{3}{5}x + B\]
where \(c_1\), \(c_2\), and \(B\) are arbitrary constants.
Now let's proceed with the method of variation of parameters.
**Method of Variation of Parameters:**
Step 1: Find the homogeneous solution.
We already found the homogeneous solution earlier:
\[y_h(x) = c_1 + c_2e^{7x}\]
Step 2: Find the particular solution using variation of parameters.
We assume the particular solution to have the form \(y_p(x) = u_1(x)y_1(x) + u_2(x)y_2(x)\), where \(y_1(x)\) and \(y_2(x)\) are the fundamental solutions of the homogeneous equation, and \(u_1(x)\) and \(u_2(x)\) are functions to be determined.
The fundamental solutions are:
\[y_1(x) = 1, \quad y_2(x) = e^{7
x}\]
We need to find \(u_1(x)\) and \(u_2(x)\). Let's differentiate the particular solution:
\[y_p'(x) = u_1'(x)y_1(x) + u_2'(x)y_2(x) + u_1(x)y_1'(x) + u_2(x)y_2'(x)\]
\[y_p''(x) = u_1''(x)y_1(x) + u_2''(x)y_2(x) + 2u_1'(x)y_1'(x) + 2u_2'(x)y_2'(x) + u_1(x)y_1''(x) + u_2(x)y_2''(x)\]
Substituting these derivatives into the original equation, we get:
\[u_1''(x)y_1(x) + u_2''(x)y_2(x) + 2u_1'(x)y_1'(x) + 2u_2'(x)y_2'(x) + u_1(x)y_1''(x) + u_2(x)y_2''(x) - 7\left(u_1'(x)y_1(x) + u_2'(x)y_2(x) + u_1(x)y_1'(x) + u_2(x)y_2'(x)\right) = -3\]
Simplifying the equation and using \(y_1(x) = 1\) and \(y_2(x) = e^{7x}\):
\[u_1''(x) + u_2''(x) - 7u_1'(x) - 7u_2'(x) = -3\]
Now, we have two equations:
\[u_1''(x) - 7u_1'(x) = -3\] ---(1)
\[u_2''(x) - 7u_2'(x) = 0\] ---(2)
To solve these equations, we assume that \(u_1(x)\) and \(u_2(x)\) are of the form:
\[u_1(x) = c_1(x)e^{-7x}\]
\[u_2(x) = c_2(x)\]
Substituting these assumptions into equations (1) and (2):
\[c_1''(x)e^{-7x} - 7c_1'(x)e^{-7x} = -3\]
\[c_2''(x) - 7c_2'(x) = 0\]
Differentiating \(c_1(x)\) twice:
\[c_1''(x) = -3e^{7x}\]
Substituting this into the first equation:
\[-3e^{7x}e^{-7x} - 7c_1'(x)e^{-7x} = -3\]
Simplifying:
\[-3 - 7c_1'(x)e^{-7x} = -3\]
\[c_1'(x)e^{-7x} = 0\]
\[c_1'(x) = 0\]
\[c_1(x) = A\]
where \(A\) is a constant.
Substituting \(c_1(x) = A\) and integrating the second equation:
\[c_2'(x) - 7c_2(x) = 0\]
\[\frac{dc_2(x)}{dx} = 7c_2(x)\]
\[\frac{dc_2
(x)}{c_2(x)} = 7dx\]
\[\ln|c_2(x)| = 7x + B_1\]
\[c_2(x) = Ce^{7x}\]
where \(C\) is a constant.
Therefore, the particular solution is:
\[y_p(x) = u_1(x)y_1(x) + u_2(x)y_2(x)\]
\[y_p(x) = Ae^{-7x} + Ce^{7x}\]
Step 3: Combine the homogeneous and particular solutions.
The general solution is given by:
\[y(x) = y_h(x) + y_p(x)\]
\[y(x) = c_1 + c_2e^{7x} + Ae^{-7x} + Ce^{7x}\]
where \(c_1\), \(c_2\), \(A\), and \(C\) are arbitrary constants.
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verify that the given differential equation is exact; then solve it. (9x^3 8y/x)dx (y^2 8lnx)dy=0
Given differential equation is:(9x^3 8y/x)dx (y^2 8lnx)dy=0.
If a differential equation is of the form M(x,y)dx + N(x,y)dy = 0, then it is called an exact differential equation
if:∂M/∂y = ∂N/∂x
Here, M = 9x³ + 8y/x and N = y² + 8lnx.
Therefore, ∂M/∂y = 8 and ∂N/∂x = 8/x.
Thus, the given differential equation is an exact differential equation.
Now, to find the solution of an exact differential equation, we integrate either M or N with respect to x or y, respectively.
Let's integrate M w.r.t x. So, we get:
∫Mdx = ∫(9x³ + 8y/x)dx= 9/4 x⁴ + 8y ln x + h(y) (put h(y) = 0,
since ∂(∂M/∂y)/∂y = ∂(∂N/∂x)/∂x )
Differentiating the above w.r.t y, we get:(d/dy) ∫Mdx = 8x + h'(y)
Comparing the above with N = y² + 8lnx
We get, h'(y) = y²∴ h(y) = y³/3 + c Here, c is a constant of integration.
The general solution of is 9/4 x⁴ + 8y ln x + y³/3 = c.
Yes the differential equation is exact
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For the polynomial x⁶-64 , could you apply the Difference of Cubes? Difference of Squares? Explain your answers.
For the polynomial x⁶-64, we can apply the Difference of Squares but not the Difference of Cubes.
The Difference of Squares is a factoring pattern that can be used when we have the difference of two perfect squares, which means two terms that are both perfect squares and are being subtracted. In this case, x⁶-64 can be written as (x³)² - 8². This can be factored further as (x³ - 8)(x³ + 8).
However, the Difference of Cubes is a factoring pattern that can be used when we have the difference of two perfect cubes, which means two terms that are both perfect cubes and are being subtracted. Since x⁶-64 does not fit this pattern, we cannot apply the Difference of Cubes.
In summary, for the polynomial x⁶-64, we can apply the Difference of Squares by factoring it as (x³ - 8)(x³ + 8), but we cannot apply the Difference of Cubes.
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Consider the line \( L \) described by the equation \( -x-3 y=-7 \). (a) The graph of \( L \) is a line with slope \( m, y \)-intercept at \( (0, b) \), and \( x \)-intercept at \( (a, 0) \)
The line [tex]L[/tex] is [tex]y=\frac{7}{3}x+\frac{7}{3}[/tex].
The given equation of the line is [tex]-x-3y=-7[/tex].
The slope-intercept form is [tex]y=mx+b[/tex], where [tex]m[/tex] is the slope and [tex]b[/tex] is the [tex]y[/tex]-intercept.
Substitute [tex]y=0[/tex] in the given equation to get [tex]x=7[/tex]. So, the [tex]x[/tex]-intercept is at the point (7, 0).
Substitute [tex]x=0[/tex] in the given equation to get [tex]y=\frac{7}{3}[/tex]. So, the [tex]y[/tex]-intercept is at the point (0, 7/3)
Put both points in [tex]y=mx+b[/tex] to get [tex]m[/tex] and [tex]b[/tex] respectively.
Slope [tex]m=\frac{7}{3 \cdot 1} =\frac{7}{3}[/tex] and [tex]y[/tex]-intercept [tex]b=\frac{7}{3}[/tex].
Therefore, the line [tex]L[/tex] is [tex]y=\frac{7}{3}x+\frac{7}{3}[/tex].
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The table shows the latitude and longitude of three cities.
Earth is approximately a sphere with a radius of 3960 miles. The equator and all meridians are great circles. The circumference of a great circle is equal to the length of the equator or any meridian. Find the length of a great circle on Earth in miles.
| City | Latitude | Longitude
| A | 37°59'N | 84°28'W
| B | 34°55'N | 138°36'E
| C | 64°4'N | 21°58'W
Simplifying the equation gives us the length of the great circle between cities A and B. You can follow the same process to calculate the distances between other pairs of cities.
To find the length of a great circle on Earth, we need to calculate the distance between the two points given by their latitude and longitude.
Using the formula for calculating the distance between two points on a sphere, we can find the length of the great circle.
Let's calculate the distance between cities A and B:
- The latitude of the city A is 37°59'N, which is approximately 37.9833°.
- The longitude of city A is 84°28'W, which is approximately -84.4667°.
- The latitude of city B is 34°55'N, which is approximately 34.9167°.
- The longitude of city B is 138°36'E, which is approximately 138.6°.
Using the Haversine formula, we can calculate the distance:
[tex]distance = 2 * radius * arcsin(sqrt(sin((latB - latA) / 2)^2 + cos(latA) * cos(latB) * sin((lonB - lonA) / 2)^2))[/tex]
Substituting the values:
[tex]distance = 2 * 3960 * arcsin(sqrt(sin((34.9167 - 37.9833) / 2)^2 + cos(37.9833) * cos(34.9167) * sin((138.6 - -84.4667) / 2)^2))[/tex]
Simplifying the equation gives us the length of the great circle between cities A and B. You can follow the same process to calculate the distances between other pairs of cities.
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The length of a great circle on Earth is approximately 24,892.8 miles.
To find the length of a great circle on Earth, we need to calculate the distance along the circumference of a circle with a radius of 3960 miles.
The circumference of a circle is given by the formula C = 2πr, where C is the circumference and r is the radius.
Substituting the given radius, we get C = 2π(3960) = 7920π miles.
To find the length of a great circle, we need to find the circumference.
Since the circumference of a great circle is equal to the length of the equator or any meridian, the length of a great circle on Earth is approximately 7920π miles.
To calculate this value, we can use the approximation π ≈ 3.14.
Therefore, the length of a great circle on Earth is approximately 7920(3.14) = 24,892.8 miles.
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Find the cross product ⟨−3,1,2⟩×⟨5,2,5⟩.
The cross product of two vectors can be calculated to find a vector that is perpendicular to both input vectors. The cross product of (-3, 1, 2) and (5, 2, 5) is (-1, -11, -11).
To find the cross product of two vectors, we can use the following formula:
[tex]\[\vec{v} \times \vec{w} = \begin{vmatrix} \hat{i} & \hat{j} & \hat{k} \\ v_1 & v_2 & v_3 \\ w_1 & w_2 & w_3 \end{vmatrix}\][/tex]
where [tex]\(\hat{i}\), \(\hat{j}\), and \(\hat{k}\)[/tex] are the unit vectors in the x, y, and z directions, respectively, and [tex]\(v_1, v_2, v_3\) and \(w_1, w_2, w_3\)[/tex] are the components of the input vectors.
Applying this formula to the given vectors (-3, 1, 2) and (5, 2, 5), we can calculate the cross-product as follows:
[tex]\[\begin{vmatrix} \hat{i} & \hat{j} & \hat{k} \\ -3 & 1 & 2 \\ 5 & 2 & 5 \end{vmatrix} = (1 \cdot 5 - 2 \cdot 2) \hat{i} - (-3 \cdot 5 - 2 \cdot 5) \hat{j} + (-3 \cdot 2 - 1 \cdot 5) \hat{k}\][/tex]
Simplifying the calculation, we find:
[tex]\[\vec{v} \times \vec{w} = (-1) \hat{i} + (-11) \hat{j} + (-11) \hat{k}\][/tex]
Therefore, the cross product of (-3, 1, 2) and (5, 2, 5) is (-1, -11, -11).
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f(x) = 4x2 − 3 and g(x) = 4x − 5. Find the value, if possible. (f − g)(−7) = ___________ (f − g)(−7) = ___________
(f - g)(-7) = 226, To find the value of (f - g)(-7), we need to substitute -7 into the expressions for f(x) and g(x) and then subtract g(x) from f(x).
f(x) = [tex]4x^2 - 3[/tex]
g(x) = 4x - 5
Let's start by evaluating f(-7):
f(x) = [tex]4x^2 - 3[/tex]
f(-7) =[tex]4(-7)^2 - 3[/tex]
f(-7) = 4(49) - 3
f(-7) = 196 - 3
f(-7) = 193
Now, let's evaluate g(-7):
g(x) = 4x - 5
g(-7) = 4(-7) - 5
g(-7) = -28 - 5
g(-7) = -33
Finally, we can find (f - g)(-7) by subtracting g(-7) from f(-7):
(f - g)(-7) = f(-7) - g(-7)
(f - g)(-7) = 193 - (-33)
(f - g)(-7) = 193 + 33
(f - g)(-7) = 226
Therefore, (f - g)(-7) = 226.
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Describe the following set of points in space with a single equation AND sketch the surface(s) they describe: (a) The set of points in space that are a distance 4 from the point (3,1, -2). (b) The set of points in space that are equidistant from the point (0,0, 4) and the xy-plane. (Fully simplify your equation).
(a) The set of points in space that are a distance 4 from the point (3,1, -2) is a sphere with center at (3,1, -2) and radius 4. The equation of a sphere with center (a,b,c) and radius r is given by:
(x - a)^2 + (y - b)^2 + (z - c)^2 = r^2
Plugging in the values, we get:
(x - 3)^2 + (y - 1)^2 + (z + 2)^2 = 16
This is the equation of the sphere.
(b) The set of points in space that are equidistant from the point (0,0, 4) and the xy-plane is a cone with vertex at (0,0,4) and axis along the z-axis. The equation of a cone with vertex (a,b,c) and axis along the z-axis is given by:
(x - a)^2 + (y - b)^2 = k(z - c)^2
where k is a constant that depends on the angle of the cone. In this case, since the cone is symmetric about the z-axis, we can assume that k = 1.
Plugging in the values, we get:
x^2 + y^2 = z^2 - 8z + 16
This is the equation of the cone.
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question 10
Find an equation of the circle that satisfies the given conditions. (Use the variables \( x \) and \( y_{4} \) ) Endpoints of a diameter are \( P(-2,2) \) and \( Q(6,8) \)
The equation of the circle that satisfies the given conditions, with endpoints of a diameter at \( P(-2,2) \) and \( Q(6,8) \), is **\((x - 2)^2 + (y - 4)^2 = 36\)**.
To find the equation of a circle given the endpoints of a diameter, we can use the midpoint formula to find the center of the circle. The midpoint of the diameter is the center of the circle. Let's find the midpoint using the coordinates of \( P(-2,2) \) and \( Q(6,8) \):
Midpoint \( M \) = \(\left(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}\right)\)
Midpoint \( M \) = \(\left(\frac{-2 + 6}{2}, \frac{2 + 8}{2}\right)\)
Midpoint \( M \) = \(\left(\frac{4}{2}, \frac{10}{2}\right)\)
Midpoint \( M \) = \((2, 5)\)
The coordinates of the midpoint \( M \) give us the center of the circle, which is \( (2, 5) \).
Next, we need to find the radius of the circle. We can use the distance formula to find the distance between \( P(-2,2) \) and \( Q(6,8) \), which is equal to twice the radius. Let's calculate the distance:
\(d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}\)
\(d = \sqrt{(6 - (-2))^2 + (8 - 2)^2}\)
\(d = \sqrt{8^2 + 6^2}\)
\(d = \sqrt{64 + 36}\)
\(d = \sqrt{100}\)
\(d = 10\)
Since the distance between the endpoints is equal to twice the radius, the radius of the circle is \( \frac{10}{2} = 5 \).
Now that we have the center and radius, we can write the equation of the circle using the standard form:
\((x - h)^2 + (y - k)^2 = r^2\), where \( (h, k) \) is the center and \( r \) is the radius.
Plugging in the values, we get:
\((x - 2)^2 + (y - 5)^2 = 5^2\)
\((x - 2)^2 + (y - 4)^2 = 25\)
Therefore, the equation of the circle that satisfies the given conditions, with endpoints of a diameter at \( P(-2,2) \) and \( Q(6,8) \), is \((x - 2)^2 + (y - 4)^2 = 36\).
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Equations are given below illustrating a suspected number pattern. Determine what the next equation would be, and verify that it is indeed a true statement. 3=1×33+11=2×73+11+19=3×11 Select the correct answer below and fill in any answer boxes within your choice. (Type the terms of your expression in the same order as they appear in the original expression. Do not perform the calculation. Use the multiplication symbol in the math palette as needed. ) A. The next equation is It is a false statement because the left side of the equation simplifies to and the right side of the equation simplifies to B. The next equation is It is a true
The next equation in the suspected number pattern is 4 = 4 × 13. This statement is true because the left side of the equation simplifies to 4, which is equal to the right side of the equation when evaluated.
By observing the given equations, we can identify a pattern. In the first equation, 3 is obtained by multiplying 1 with 33 and adding 11. In the second equation, 73 is obtained by multiplying 2 with 33 and adding 11. In the third equation, 11 + 19 results from multiplying 3 with 33 and adding 11.
Therefore, it appears that the common factor in these equations is the multiplication of a variable, which seems to correspond to the number of the equation itself, with 33, followed by the addition of 11. Applying this pattern to the next equation, we can predict that it will be 4 = 4 × 13.
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(a) Use Newton's method to find the critical numbers of the function
f(x) = x6 ? x4 + 2x3 ? 3x
correct to six decimal places. (Enter your answers as a comma-separated list.)
x =
(b) Find the absolute minimum value of f correct to four decimal places.
The critical numbers of the function f(x) = x⁶ - x⁴ + 2x³ - 3x.
x₅ = 1.35240 is correct to six decimal places.
Use Newton's method to find the critical numbers of the function
Newton's method
[tex]x_{x+1} = x_n - \frac{x_n^6-(x_n)^4+2(x_n)^3-3x}{6(x_n)^5-4(x_n)^3+6(x_n)-3}[/tex]
f(x) = x⁶ - x⁴ + 2x³ - 3x
f'(x) = 6x⁵ - 4x³ + 6x² - 3
Now plug n = 1 in equation
[tex]x_{1+1} = x_n -\frac{x^6-x^4+2x^3=3x}{6x^5-4x^3+6x^2-3} = \frac{6}{5}[/tex]
Now, when x₂ = 6/5, x₃ = 1.1437
When, x₃ = 1.1437, x₄ = 1.135 and when x₄ = 1.1437 then x₅ = 1.35240.
x₅ = 1.35240 is correct to six decimal places.
Therefore, x₅ = 1.35240 is correct to six decimal places.
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Let C be the following matrix: C= ⎝
⎛
2
1
0
−2
6
4
1
6
9
6
2
9
12
7
1
0
⎠
⎞
Give a basis for the column space of C in the format [1,2,3],[3,4,5], for example. 因 뭄
A matrix is a two-dimensional array of numbers arranged in rows and columns. It is a collection of numbers arranged in a rectangular pattern. the column space of C is the span of the linearly independent columns, which is a two-dimensional subspace of R4.
The basis of the column space of a matrix refers to the number of non-zero linearly independent columns that make up the matrix.To find the basis for the column space of the matrix C, we would need to find the linearly independent columns. We can simplify the matrix to its reduced row echelon form to obtain the linearly independent columns.
Let's begin by performing row operations on the matrix and reducing it to its row echelon form as shown below:[tex]$$\begin{bmatrix}2 & 1 & 0 & -2 \\ 6 & 4 & 1 & 6 \\ 9 & 6 & 2 & 9 \\ 12 & 7 & 1 & 0\end{bmatrix}$$\begin{aligned}\begin{bmatrix}2 & 1 & 0 & -2 \\ 0 & 1 & 1 & 9 \\ 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & -24\end{bmatrix}\end{aligned}[/tex] Therefore, the basis for the column space of the matrix C is:[tex]$$\begin{bmatrix}2 \\ 6 \\ 9 \\ 12\end{bmatrix}, \begin{bmatrix}1 \\ 4 \\ 6 \\ 7\end{bmatrix}$$[/tex] In the requested format, the basis for the column space of C is [tex][2,6,9,12],[1,4,6,7][/tex].The basis of the column space of C is the set of all linear combinations of the linearly independent columns.
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Question 2 Describe the graph of the function \( z=f(x, y)=x^{2}+y^{2} \).
The graph of the function z = f(x, y) = x² + y² is a surface in three-dimensional space. It represents a paraboloid centered at the origin with its axis aligned with the z-axis.
The shape of the graph is similar to an upward-opening bowl or a circular cone. As you move away from the origin along the x and y axes, the function increases quadratically, resulting in a smooth and symmetric surface.
The contour lines of the graph are concentric circles centered at the origin, with each circle representing a specific value of z. The closer the contour lines are to the origin, the smaller the corresponding values of z. As you move away from the origin, the values of z increase.
The surface has rotational symmetry around the z-axis. This means that if you rotate the graph about the z-axis by any angle, the resulting shape remains the same.
In summary, the graph of the function z = f(x, y) = x² + y² is a smooth, upward-opening paraboloid centered at the origin, with concentric circles as its contour lines. It exhibits symmetry around the z-axis and represents a quadratic relationship between x, y, and z.
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