Essential Calculus: Early Transcendentals
2nd Edition
ISBN: 9781133112280
Author: James Stewart
Publisher: Cengage Learning
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Question
Chapter 11.6, Problem 51E
(a)
To determine
To prove: The two surfaces with equations
b)
To determine
To prove: The two surfaces
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(a) Two surfaces are called orthogonal at a point of intersection if their normal lines are perpendicular at that point. Show that surfaces with equations F(x, y, z) = 0 and G(x, y, z) = 0 are orthogonal at a point P where ∇F ≠ 0 and ∇G ≠ 0 if and only if FxGx + FyGy + FzGz = 0 atP(b) Use part (a) to show that the surfaces z2 = x2 + y2 and x2 + y2 + z2 = r2 are orthogonal at every point of intersection. Can you see why this is true without using calculus?
(a) Two surfaces are called orthogonal at a point of intersection if their normal lines are perpendicular at that point. Show that surfaces with equations F( x, y, z) = 0 and G(x,y, z) = 0 are orthogonal at a point P where ∇F≠ 0 and ∇F≠ 0 if and only if
FxGx +FyGy+FzGz=0 at P
(b) Use part (a) to show that the surfaces z2 = x2 +y2 and x2 +y2 + z2= 12are orthogonal at every point of intersection. Can you see why this is true without using calculus?
Show that the surfaces x2 + 2y2 + 3z2 = 3, x2 + y2 + z2 + 6x − 10y + 14 = 0, are tangent to each other at the given point (−1, 1, 0)by showing that the surfaces have the same tangent plane at this point
Chapter 11 Solutions
Essential Calculus: Early Transcendentals
Ch. 11.1 - Let g(x, y) = cos(x + 2y). (a) Evaluate g(2, 1)....Ch. 11.1 - Let F(x,y)=1+4y2. (a) Evaluate F(3,1). (b) Find...Ch. 11.1 - Let f(x,y,z)=x+y+z+ln(4x2y2z2). (a) Evaluate f(1,...Ch. 11.1 - Let g(x,y,z)=x3y2z10xyz. (a) Evaluate g(1, 2, 3)....Ch. 11.1 - Find and sketch the domain of the function....Ch. 11.1 - Find and sketch the domain of the function....Ch. 11.1 - Find and sketch the domain of the function. 15....Ch. 11.1 - Find and sketch the domain of the function....Ch. 11.1 - Find and sketch the domain of the function. 19....Ch. 11.1 - Find and sketch the domain of the function. f(x,...
Ch. 11.1 - Find and sketch the domain of the function....Ch. 11.1 - Find and sketch the domain of the function. 22....Ch. 11.1 - Prob. 14ECh. 11.1 - Prob. 13ECh. 11.1 - Prob. 15ECh. 11.1 - Sketch the graph of the function. f(x, y) = eyCh. 11.1 - 1320 Sketch the graph of the function. 17. f(x, y)...Ch. 11.1 - Prob. 18ECh. 11.1 - Prob. 20ECh. 11.1 - Prob. 19ECh. 11.1 - A contour map for a function f is shown. Use it to...Ch. 11.1 - Two contour maps are shown. One is for a function...Ch. 11.1 - Locate the points A and B on the map of Lonesome...Ch. 11.1 - Make a rough sketch of a contour map for the...Ch. 11.1 - Prob. 25ECh. 11.1 - Draw a contour map of the function showing several...Ch. 11.1 - Draw a contour map of the function showing several...Ch. 11.1 - Prob. 28ECh. 11.1 - Draw a contour map of the function showing several...Ch. 11.1 - Prob. 30ECh. 11.1 - Draw a contour map of the function showing several...Ch. 11.1 - Draw a contour map of the function showing several...Ch. 11.1 - Sketch both a contour map and a graph of the...Ch. 11.1 - Prob. 34ECh. 11.1 - Prob. 35ECh. 11.1 - Prob. 36ECh. 11.1 - Prob. 37ECh. 11.1 - Use a computer to graph the function using various...Ch. 11.1 - Prob. 39ECh. 11.1 - Prob. 40ECh. 11.1 - Prob. 41ECh. 11.1 - Prob. 42ECh. 11.1 - Prob. 43ECh. 11.1 - Prob. 44ECh. 11.1 - Prob. 45ECh. 11.1 - Prob. 46ECh. 11.1 - Prob. 47ECh. 11.1 - Prob. 48ECh. 11.1 - Prob. 49ECh. 11.1 - Prob. 50ECh. 11.1 - Prob. 51ECh. 11.1 - Prob. 52ECh. 11.1 - Prob. 53ECh. 11.1 - Prob. 55ECh. 11.1 - Prob. 54ECh. 11.1 - Prob. 56ECh. 11.2 - Prob. 1ECh. 11.2 - Prob. 2ECh. 11.2 - Prob. 3ECh. 11.2 - Prob. 4ECh. 11.2 - Prob. 5ECh. 11.2 - Prob. 6ECh. 11.2 - Prob. 7ECh. 11.2 - Prob. 8ECh. 11.2 - Prob. 9ECh. 11.2 - Prob. 10ECh. 11.2 - Prob. 11ECh. 11.2 - Prob. 12ECh. 11.2 - Prob. 13ECh. 11.2 - Prob. 14ECh. 11.2 - Prob. 15ECh. 11.2 - Prob. 16ECh. 11.2 - Prob. 17ECh. 11.2 - Prob. 18ECh. 11.2 - Prob. 19ECh. 11.2 - Prob. 20ECh. 11.2 - Determine the set of points at which the function...Ch. 11.2 - Determine the set of points at which the function...Ch. 11.2 - Determine the set of points at which the function...Ch. 11.2 - Determine the set of points at which the function...Ch. 11.2 - Determine the set of points at which the function...Ch. 11.2 - Prob. 26ECh. 11.2 - Prob. 27ECh. 11.2 - Prob. 28ECh. 11.2 - Prob. 29ECh. 11.2 - Prob. 30ECh. 11.2 - Prob. 31ECh. 11.2 - Prob. 32ECh. 11.2 - Prob. 33ECh. 11.2 - Prob. 34ECh. 11.3 - Prob. 1ECh. 11.3 - Prob. 3ECh. 11.3 - Prob. 4ECh. 11.3 - Prob. 2ECh. 11.3 - Prob. 5ECh. 11.3 - Prob. 6ECh. 11.3 - Prob. 7ECh. 11.3 - Prob. 8ECh. 11.3 - Prob. 9ECh. 11.3 - Prob. 10ECh. 11.3 - Prob. 11ECh. 11.3 - Prob. 12ECh. 11.3 - Prob. 13ECh. 11.3 - Prob. 14ECh. 11.3 - Prob. 15ECh. 11.3 - Prob. 16ECh. 11.3 - Prob. 17ECh. 11.3 - Prob. 18ECh. 11.3 - Prob. 19ECh. 11.3 - Prob. 20ECh. 11.3 - Prob. 21ECh. 11.3 - Prob. 22ECh. 11.3 - Prob. 23ECh. 11.3 - Find the first partial derivatives of the...Ch. 11.3 - Prob. 25ECh. 11.3 - Prob. 26ECh. 11.3 - Prob. 27ECh. 11.3 - Prob. 28ECh. 11.3 - Prob. 29ECh. 11.3 - Prob. 30ECh. 11.3 - Prob. 31ECh. 11.3 - Find the indicated partial derivative. 32. f(x, y)...Ch. 11.3 - Prob. 33ECh. 11.3 - Prob. 34ECh. 11.3 - Prob. 35ECh. 11.3 - Prob. 36ECh. 11.3 - 3738 Find fx and fy and graph f, fx, and fy with...Ch. 11.3 - Prob. 38ECh. 11.3 - Prob. 39ECh. 11.3 - Use implicit differentiation to find z/x and z/y....Ch. 11.3 - Use implicit differentiation to find z/x and z/y....Ch. 11.3 - Prob. 42ECh. 11.3 - Prob. 43ECh. 11.3 - Find z/x and z/y. 52. (a) z = f(x)g(y) (b) z =...Ch. 11.3 - Prob. 45ECh. 11.3 - Find all the second partial derivatives. 54. f(x,...Ch. 11.3 - Find all the second partial derivatives. 55....Ch. 11.3 - Prob. 48ECh. 11.3 - Prob. 49ECh. 11.3 - Prob. 50ECh. 11.3 - Prob. 51ECh. 11.3 - Verify that the conclusion of Clairauts Theorem...Ch. 11.3 - Prob. 53ECh. 11.3 - Prob. 54ECh. 11.3 - Prob. 55ECh. 11.3 - Prob. 56ECh. 11.3 - Prob. 57ECh. 11.3 - Find the indicated partial derivative(s). 70. u =...Ch. 11.3 - Prob. 59ECh. 11.3 - Prob. 60ECh. 11.3 - Prob. 61ECh. 11.3 - Determine whether each of the following functions...Ch. 11.3 - Verify that the function u=1/x2+y2+z2 is a...Ch. 11.3 - Prob. 64ECh. 11.3 - Prob. 65ECh. 11.3 - Prob. 66ECh. 11.3 - Show that the function z = xey + yex is a solution...Ch. 11.3 - Prob. 68ECh. 11.3 - Prob. 69ECh. 11.3 - Prob. 71ECh. 11.3 - Prob. 70ECh. 11.3 - The wind-chill index is modeled by the function W...Ch. 11.3 - Prob. 73ECh. 11.3 - Prob. 74ECh. 11.3 - Prob. 75ECh. 11.3 - Prob. 76ECh. 11.3 - Prob. 77ECh. 11.3 - Prob. 78ECh. 11.3 - Prob. 79ECh. 11.3 - Prob. 80ECh. 11.3 - Prob. 81ECh. 11.3 - Prob. 82ECh. 11.4 - Find an equation of the tangent plane to the given...Ch. 11.4 - Find an equation of the tangent plane to the given...Ch. 11.4 - Prob. 3ECh. 11.4 - Find an equation of the tangent plane to the given...Ch. 11.4 - Find an equation of the tangent plane to the given...Ch. 11.4 - Prob. 6ECh. 11.4 - Prob. 7ECh. 11.4 - Prob. 8ECh. 11.4 - Prob. 9ECh. 11.4 - Prob. 11ECh. 11.4 - Explain why the function is differentiable at the...Ch. 11.4 - Prob. 14ECh. 11.4 - Prob. 12ECh. 11.4 - Prob. 15ECh. 11.4 - Verify the linear approximation at (0, 0). 16....Ch. 11.4 - Prob. 17ECh. 11.4 - Prob. 18ECh. 11.4 - Prob. 19ECh. 11.4 - Find the differential of the function. 26....Ch. 11.4 - Prob. 21ECh. 11.4 - Prob. 22ECh. 11.4 - Prob. 23ECh. 11.4 - Prob. 24ECh. 11.4 - Prob. 25ECh. 11.4 - If z = x2 xy + 3y2 and (x, y) changes from (3, 1)...Ch. 11.4 - The length and width of a rectangle are measured...Ch. 11.4 - Use differentials to estimate the amount of metal...Ch. 11.4 - Prob. 29ECh. 11.4 - Prob. 32ECh. 11.4 - Prob. 30ECh. 11.4 - Prob. 33ECh. 11.4 - Prob. 31ECh. 11.4 - Suppose you need to know an equation of the...Ch. 11.4 - Show that the function is differentiable by...Ch. 11.4 - Show that the function is differentiable by...Ch. 11.4 - Prob. 37ECh. 11.4 - (a) The function...Ch. 11.5 - Use the Chain Rule to find dz/dt or dw/dt. 1....Ch. 11.5 - Use the Chain Rule to find dz/dt or dw/dt. 2....Ch. 11.5 - Use the Chain Rule to find dz/dt or dw/dt. 5. w =...Ch. 11.5 - Use the Chain Rule to find dz/dt or dw/dt. 6. w =...Ch. 11.5 - Use the Chain Rule to find z/s and z/t. 5....Ch. 11.5 - Use the Chain Rule to find z/s and z/t. 6....Ch. 11.5 - Use the Chain Rule to find z/s and z/t. 11. z = er...Ch. 11.5 - Prob. 8ECh. 11.5 - If z = f(x, y), where f is differentiable, and...Ch. 11.5 - Let W(s,t)=F(u(s,t),(s,t)), where F, u and are...Ch. 11.5 - Suppose f is a differentiable function of x and y,...Ch. 11.5 - Suppose f is a differentiable function of x and y,...Ch. 11.5 - Prob. 13ECh. 11.5 - Prob. 14ECh. 11.5 - Prob. 15ECh. 11.5 - Prob. 16ECh. 11.5 - Use the Chain Rule to find the indicated partial...Ch. 11.5 - Use the Chain Rule to find the indicated partial...Ch. 11.5 - Use the Chain Rule to find the indicated partial...Ch. 11.5 - Use the Chain Rule to find the indicated partial...Ch. 11.5 - Use the Chain Rule to find the indicated partial...Ch. 11.5 - Use Equation 6 to find dy/dx. 28. cos(xy) = 1 +...Ch. 11.5 - Use Equation 6 to find dy/dx. 29. tan1(x2y) = x +...Ch. 11.5 - Use Equation 6 to find dy/dx. 30. ey sin x = x +...Ch. 11.5 - Use Equations 7 to find z/x and z/y. 31. x2 + 2y2...Ch. 11.5 - Use Equations 7 to find z/y and z/y. 26....Ch. 11.5 - Use Equations 7 to find z/x and z/y. 33. ez = xyzCh. 11.5 - Use Equations 7 to find z/x and z/y. 34. yz + x ln...Ch. 11.5 - The temperature at a point (x, y) is T(x, y),...Ch. 11.5 - Prob. 30ECh. 11.5 - The speed of sound traveling through ocean water...Ch. 11.5 - Prob. 32ECh. 11.5 - Prob. 33ECh. 11.5 - The voltage V in a simple electrical circuit is...Ch. 11.5 - The pressure of 1 mole of an ideal gas is...Ch. 11.5 - A sound with frequency fs, is produced by a source...Ch. 11.5 - Assume that all the given functions are...Ch. 11.5 - Assume that all the given functions are...Ch. 11.5 - Assume that all the given functions are...Ch. 11.5 - Prob. 40ECh. 11.5 - Prob. 41ECh. 11.5 - Prob. 42ECh. 11.5 - Prob. 43ECh. 11.5 - Prob. 44ECh. 11.5 - Prob. 45ECh. 11.5 - Prob. 46ECh. 11.5 - Prob. 47ECh. 11.5 - Prob. 48ECh. 11.6 - Find the directional derivative of f at the given...Ch. 11.6 - Find the directional derivative of f at the given...Ch. 11.6 - (a) Find the gradient of f. (b) Evaluate the...Ch. 11.6 - Prob. 4ECh. 11.6 - Prob. 5ECh. 11.6 - (a) Find the gradient of f. (b) Evaluate the...Ch. 11.6 - Prob. 7ECh. 11.6 - Prob. 8ECh. 11.6 - Prob. 9ECh. 11.6 - Prob. 10ECh. 11.6 - Find the directional derivative of the function at...Ch. 11.6 - Use the figure to estimate Du, f(2, 2).Ch. 11.6 - Prob. 13ECh. 11.6 - Prob. 14ECh. 11.6 - Prob. 16ECh. 11.6 - Prob. 15ECh. 11.6 - Find the maximum rate of change of f at the given...Ch. 11.6 - Find the maximum rate of change of f at the given...Ch. 11.6 - (a) Show that a differentiable function f...Ch. 11.6 - Find the directions in which the directional...Ch. 11.6 - Find all points at which the direction of fastest...Ch. 11.6 - Near a buoy, the depth of a lake at the point with...Ch. 11.6 - The temperature T in a metal ball is inversely...Ch. 11.6 - Prob. 24ECh. 11.6 - Suppose that over a certain region of space the...Ch. 11.6 - Suppose you are climbing a hill whose shape is...Ch. 11.6 - Prob. 27ECh. 11.6 - Shown is a topographic map of Blue River Pine...Ch. 11.6 - Show that the operation of taking the gradient of...Ch. 11.6 - Prob. 30ECh. 11.6 - Prob. 31ECh. 11.6 - Prob. 32ECh. 11.6 - Find equations of (a) the tangent plane and (b)...Ch. 11.6 - Find equations of (a) the tangent plane and (b)...Ch. 11.6 - Find equations of (a) the tangent plane and (b)...Ch. 11.6 - Find equations of (a) the tangent plane and (b)...Ch. 11.6 - Use a computer to graph the surface, the tangent...Ch. 11.6 - Use a computer to graph the surface, the tangent...Ch. 11.6 - If f(x, y) = xy, find the gradient vector f(3, 2)...Ch. 11.6 - If g(x, y) = x2 + y2 4x, find the gradient vector...Ch. 11.6 - Show that the equation of the tangent plane to the...Ch. 11.6 - At what point on the paraboloid y=x2+z2 is the...Ch. 11.6 - Are there any points on the hyperboloid x2 y2 z2...Ch. 11.6 - Show that the ellipsoid 3x2 + 2y2 + z2 = 9 and the...Ch. 11.6 - Where does the normal line to the paraboloid z =...Ch. 11.6 - Prob. 46ECh. 11.6 - Show that the sum of the x-, y-, and z-intercepts...Ch. 11.6 - Prob. 48ECh. 11.6 - Find parametric equations tor the tangent line to...Ch. 11.6 - Prob. 50ECh. 11.6 - Prob. 51ECh. 11.6 - Prob. 52ECh. 11.6 - Suppose that the directional derivatives of f(x,...Ch. 11.6 - Prob. 54ECh. 11.7 - Suppose (1, 1) is a critical point of a function f...Ch. 11.7 - Use the level curves in the figure to predict the...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Find the local maximum and minimum values and...Ch. 11.7 - Prob. 9ECh. 11.7 - Prob. 10ECh. 11.7 - Prob. 11ECh. 11.7 - Prob. 12ECh. 11.7 - Prob. 13ECh. 11.7 - Prob. 14ECh. 11.7 - Prob. 15ECh. 11.7 - Prob. 16ECh. 11.7 - Prob. 17ECh. 11.7 - Use a graph or level curves or both to estimate...Ch. 11.7 - Prob. 19ECh. 11.7 - Prob. 20ECh. 11.7 - Use a graphing device as in Example 4 (or Newtons...Ch. 11.7 - Use a graphing device as in Example 4 (or Newtons...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Find the absolute maximum and minimum values of f...Ch. 11.7 - Prob. 29ECh. 11.7 - Prob. 30ECh. 11.7 - Prob. 31ECh. 11.7 - Prob. 32ECh. 11.7 - Prob. 33ECh. 11.7 - Prob. 34ECh. 11.7 - Prob. 35ECh. 11.7 - Prob. 36ECh. 11.7 - Prob. 37ECh. 11.7 - Prob. 38ECh. 11.7 - Prob. 39ECh. 11.7 - Prob. 40ECh. 11.7 - Prob. 41ECh. 11.7 - The base of an aquarium with given volume V is...Ch. 11.7 - Prob. 43ECh. 11.7 - Prob. 44ECh. 11.7 - Prob. 45ECh. 11.7 - Prob. 46ECh. 11.7 - Prob. 47ECh. 11.7 - Prob. 48ECh. 11.8 - Pictured are a contour map of f and a curve with...Ch. 11.8 - Prob. 21ECh. 11.8 - Use Lagrange multipliers to find the maximum and...Ch. 11.8 - Each of these extreme value problems has a...Ch. 11.8 - Use Lagrange multipliers to find the maximum and...Ch. 11.8 - Prob. 4ECh. 11.8 - Each of these extreme value problems has a...Ch. 11.8 - Prob. 6ECh. 11.8 - Use Lagrange multipliers to find the maximum and...Ch. 11.8 - Prob. 8ECh. 11.8 - Prob. 9ECh. 11.8 - Prob. 10ECh. 11.8 - Prob. 11ECh. 11.8 - Prob. 12ECh. 11.8 - Find the extreme values of f subject to both...Ch. 11.8 - Prob. 14ECh. 11.8 - Prob. 15ECh. 11.8 - Prob. 16ECh. 11.8 - Find the extreme values of f on the region...Ch. 11.8 - Prob. 18ECh. 11.8 - Prob. 19ECh. 11.8 - Prob. 22ECh. 11.8 - Prob. 23ECh. 11.8 - Prob. 25ECh. 11.8 - Prob. 26ECh. 11.8 - Use Lagrange multipliers to prove that the...Ch. 11.8 - Use Lagrange multipliers to prove that the...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Use Lagrange multipliers to give an alternate...Ch. 11.8 - Prob. 37ECh. 11.8 - Prob. 38ECh. 11.8 - Prob. 39ECh. 11.8 - Prob. 40ECh. 11.8 - Prob. 41ECh. 11.8 - Prob. 42ECh. 11.8 - The plane x + y + 2z = 2 intersects the paraboloid...Ch. 11.8 - Prob. 44ECh. 11.8 - (a) Find the maximum value of...Ch. 11.8 - Prob. 48ECh. 11 - Prob. 1RCCCh. 11 - What is a function of three variables? How can you...Ch. 11 - Prob. 3RCCCh. 11 - (a) What does it mean to say that f is continuous...Ch. 11 - Prob. 5RCCCh. 11 - What does Clairauts Theorem say?Ch. 11 - Prob. 7RCCCh. 11 - Define the linearization of f at (a, b). What is...Ch. 11 - Prob. 9RCCCh. 11 - If z = f(x, y), what arc the differentials dx, dy,...Ch. 11 - State the Chain Rule for the case where z = f(x,...Ch. 11 - If z is defined implicitly as a function of x and...Ch. 11 - Prob. 13RCCCh. 11 - Prob. 14RCCCh. 11 - Prob. 15RCCCh. 11 - Prob. 16RCCCh. 11 - State the Second Derivatives Test.Ch. 11 - (a) What is a closed set in 2? What is a bounded...Ch. 11 - Explain how the method of Lagrange multipliers...Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Prob. 2RQCh. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Prob. 8RQCh. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Determine whether the statement is true or false....Ch. 11 - Find and sketch the domain of the function. 1....Ch. 11 - Find and sketch the domain of the function. 2....Ch. 11 - Sketch the graph of the function. 3. f(x, y) = 1 ...Ch. 11 - Sketch the graph of the function. 4. f(x, y) = x2...Ch. 11 - Sketch several level curves of the function. 5....Ch. 11 - Sketch several level curves of the function. 6....Ch. 11 - Make a rough sketch of a contour map for the...Ch. 11 - The contour map of a function f is shown, (a)...Ch. 11 - Prob. 9RECh. 11 - Prob. 10RECh. 11 - Prob. 11RECh. 11 - Prob. 12RECh. 11 - Prob. 13RECh. 11 - Prob. 14RECh. 11 - Prob. 15RECh. 11 - The speed of sound traveling through ocean water...Ch. 11 - Prob. 17RECh. 11 - Prob. 18RECh. 11 - Prob. 19RECh. 11 - Prob. 20RECh. 11 - If z = xy + xey/x show that xzx+yzy=xy+z.Ch. 11 - Prob. 22RECh. 11 - Prob. 23RECh. 11 - Prob. 24RECh. 11 - Prob. 25RECh. 11 - Prob. 26RECh. 11 - Prob. 27RECh. 11 - Prob. 28RECh. 11 - Prob. 29RECh. 11 - Find du if u = ln(1 + se2t).Ch. 11 - Prob. 31RECh. 11 - Prob. 32RECh. 11 - Prob. 33RECh. 11 - If v = x2sin y + yexy, where x = s + 2t and y =...Ch. 11 - Prob. 35RECh. 11 - Prob. 36RECh. 11 - Prob. 37RECh. 11 - The length x of a side of a triangle is increasing...Ch. 11 - Prob. 39RECh. 11 - If cos(xyz) = 1 + .x2y2 + z2, find zx and zy.Ch. 11 - Prob. 41RECh. 11 - Prob. 42RECh. 11 - Prob. 43RECh. 11 - Find the directional derivative of f at the given...Ch. 11 - Find the maximum rate of change of f(x,y)=x2y+y at...Ch. 11 - Find parametric equations of the tangent line at...Ch. 11 - Find the local maximum and minimum values and...Ch. 11 - Find the local maximum and minimum values and...Ch. 11 - Find the local maximum and minimum values and...Ch. 11 - Find the local maximum and minimum values and...Ch. 11 - Find the absolute maximum and minimum values of f...Ch. 11 - Find the absolute maximum and minimum values of f...Ch. 11 - Use a graph or level curves or both to estimate...Ch. 11 - Use a graphing calculator or computer (or Newtons...Ch. 11 - Use Lagrange multipliers to find the maximum and...Ch. 11 - Use Lagrange multipliers to find the maximum and...Ch. 11 - Use Lagrange multipliers to find the maximum and...Ch. 11 - Use Lagrange multipliers to find the maximum and...Ch. 11 - Prob. 59RECh. 11 - A package in the shape of a rectangular box can be...Ch. 11 - A pentagon is formed by placing an isosceles...Ch. 11 - Prob. 62RE
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- 3. (a) Show that the two surfaces S1 : z = xy and S2 : z =3x^2/4 - y^2 perpendicularly at the point (2, 1, 2).b) Show that every tangent plane to the cone z^2 = x^2+y^2 must pass through the origin.arrow_forwardFind an equation of the tangent plane to the surface at the given point. X²+y²+z²=14, (1,2,3) And find a set of symmetric equation for the normal line to the surface at the given point. ○X-1/1 = y-2/2 = z-3/3 ○X-1/14 = y-2/14 = z-3/14 ○X/1 = y/2 = z/3 ○X/14 = y/14 = z/14 ○X-1 = y-2 = z-3arrow_forwardLet f(x,y,z)=-x^2+sin(y)-2z^2=0 define a surface in 3 dimensions. Find the equation of the normal line to the surface in 3 dimensions. Find a point which is at a distance of 4 from the tangent plane at the point (2pi, 0, 3/2). Hint: you have the normal to this plane.....).arrow_forward
- Dierentiable curves with zero torsion lie in planes That a sufficiently di¡erentiable curve with zero torsion lies in a plane is a special case of the fact that a particle whose velocity remains perpendicular to a fixed vector C moves in a plane perpendicular to C. This, in turn, can be viewed as the following result. Suppose r(t) = ƒ(t)i + g(t)j + h(t)k is twice di¡erentiable for all t in an interval 3a, b4 , that r = 0 when t = a, and that v # k = 0 for all t in 3a, b4 . Show that h(t) = 0 for all t in 3a, b4 . (Hint: Start with a = d2r/dt2 and apply the initial conditions in reverse order.)arrow_forwardA smooth curve is normal to a surface ƒ(x, y, z) = c at a point of intersection if the curve’s velocity vector is a nonzero scalar multiple of ∇ƒ at the point. Show that the curve r(t) = sqrt(t) i + sqrt(t) j-1/4(t+3)k is normal to the surface x2 + y2 - z = 3 when t = 1.arrow_forwardA curve C is defined as the intersection of the surfaces x^2+y^2=2 and z=x^2 . Find the curvature of C and the principal normal at the point P(1,1,1)arrow_forward
- find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. 1. Surfaces: x + y2 + z = 2, y = 1 Point: (1/2, 1, 1/2) 2. Surfaces: x3 + 3x2y2 + y3 + 4xy - z2 = 0, x2 + y2 + z2 = 11 (1, 1, 3) Point: 3. Surfaces: x2 + y2 = 4, x2 + y2 - z = 0 Point: (sqrt(2), sqrt(2), 4)arrow_forward1. Consider the surface defined by z = x2 + e9y ln(x-y). Let f(x,y) = x2 + e9y ln(x-y). ○ Compute ∇f at the point (1,0). ○ Compute the derivative of f(x,y) at the point (1,0) in the direction (3,-4). ○ Explain the geometric relationship between the answer found in part (a) and the surface defined above.arrow_forwardThe base of the closed cubelike surface shown here is the unit square in the xy-plane. The four sides lie in the planes x = 0, x = 1, y = 0, and y = 1. The top is an arbitrary smooth surface whose identity is unknown. Let F = x i - 2y j + (z + 3)k, and suppose the outward flux of F through Side A is 1 and through Side B is -3. Can you conclude anything about the outward flux through the top? Give reasons for your answer.arrow_forward
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