CALCULUS+ITS APPLICATIONS
CALCULUS+ITS APPLICATIONS
15th Edition
ISBN: 9780137590612
Author: Goldstein
Publisher: RENT PEARS
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Chapter 7, Problem 21RE

In Exercises 21 − 23 , find all points ( x ,   y ) where f ( x ,   y ) has a possible relative maximum or minimum. Then, use the second-derivative test to determine, if possible, the nature of f ( x ,   y ) at each of these points. If the second-derivative test is inconclusive, so state.

f ( x ,   y ) = x 2 + 3 x y + 4 y 2 − 13 x − 30 y + 12

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Consider the function f(x) = In (x² - 4) a.) Use the First Derivative Test or the Second Derivative Test to find any points that are local maxima and local minima. Include both x and y coordinates. b.) Find any inflection points of f. Make sure to include both x and y coordinates.
3. Let f(x) = 8x- 3x*+5 %3! a) Find where f has stationary points. b) Perform a sign analysis on the derivative of f. Find where f is increasing and decreasing. c) Use your results to find where all local maxima and minima of foccur.

Chapter 7 Solutions

CALCULUS+ITS APPLICATIONS

Ch. 7.1 - Let f(x,y,z)=x2+y(xz)4. Compute f(3,5,2).Ch. 7.1 - Prob. 2CYUCh. 7.1 - Let f(x,y)=x23xyy2. Compute f(5,0),f(5,2) and...Ch. 7.1 - Prob. 2ECh. 7.1 - Let g(x,y,z)=x/(yz). Compute g(1,1),g(0,1) and...Ch. 7.1 - Let f(x,y,z)=x2ey2+z2. Compute f(1,1,1) and...Ch. 7.1 - Let f(x,y)=xy. Show that f(2+h,3)f(2,3)=3h.Ch. 7.1 - Let f(x,y)=xy. Show that f(2,3+k)f(2,3)=2k.Ch. 7.1 - Cost Find a formula C(x,y,z) that gives the cost...Ch. 7.1 - Cost Find a formula C(x,y,z) that gives the cost...
Ch. 7.1 - Consider the cobb-Douglas production function...Ch. 7.1 - Let f(x,y)=10x25y35. Show that f(3a,3b)=3f(a,b).Ch. 7.1 - Present value The present value of A dollars to be...Ch. 7.1 - Refer to Example 3. If labor costs $100 per unit...Ch. 7.1 - Tax and Homeowner Exemption The value of...Ch. 7.1 - Tax and Homeowner Exemption Let f(r,v,x) be the...Ch. 7.1 - Draw the level curve of height 0,1 and 2 for the...Ch. 7.1 - Draw the level curve of height 0,1 and 2 for the...Ch. 7.1 - Draw the level curve of function f(x,y)=xy...Ch. 7.1 - Draw the level curve of function f(x,y)=xy...Ch. 7.1 - Find the function f(x,y) that has line y=3x4 as a...Ch. 7.1 - Find the function f(x,y) that has the curve y=2x2...Ch. 7.1 - Suppose that a topographic map is viewed as the...Ch. 7.1 - Isocost Lines A certain production process uses...Ch. 7.1 - Match the graphs of the functions in Exercises...Ch. 7.1 - Match the graphs of the functions in Exercises...Ch. 7.1 - Match the graphs of the functions in Exercises...Ch. 7.1 - Match the graphs of the functions in Exercises...Ch. 7.2 - The number of TV sets an appliance store sells per...Ch. 7.2 - The monthly mortgage payment for a house is a...Ch. 7.2 - Find fxandfy for each of the following functions....Ch. 7.2 - Prob. 2ECh. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Prob. 6ECh. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Find fxandfy for each of the following function....Ch. 7.2 - Prob. 13ECh. 7.2 - Let f(p,q)=1p(1+q). Find fq and fp.Ch. 7.2 - Let f(x,y,z)=(1+x2y)/z. fx,fy,andfz.Ch. 7.2 - Prob. 16ECh. 7.2 - Let f(x,y,z)=xzeyz. Find fx,fy,andfz.Ch. 7.2 - Let f(x,y,z)=xyz. Find fx,fz,andfz.Ch. 7.2 - Let f(x,y,z)=x2+2xy+y2+3x+5y. Find...Ch. 7.2 - Prob. 20ECh. 7.2 - Let f(x,y)=xy2+5. Evaluate fy at (x,y)=(2,1) and...Ch. 7.2 - Prob. 22ECh. 7.2 - Prob. 23ECh. 7.2 - Prob. 24ECh. 7.2 - Prob. 25ECh. 7.2 - ProductivityLabor and Capital The productivity of...Ch. 7.2 - Prob. 27ECh. 7.2 - Prob. 28ECh. 7.2 - Let p1 be the average price of MP3 players, p2 the...Ch. 7.2 - Prob. 30ECh. 7.2 - Prob. 31ECh. 7.2 - Prob. 32ECh. 7.2 - Prob. 33ECh. 7.2 - Prob. 34ECh. 7.2 - Prob. 35ECh. 7.2 - Compute 2fy2, where f(x,y)=60x3/4y1/4, a...Ch. 7.2 - Prob. 37ECh. 7.2 - Prob. 38ECh. 7.3 - Prob. 1CYUCh. 7.3 - Prob. 2CYUCh. 7.3 - Prob. 1ECh. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Prob. 3ECh. 7.3 - Prob. 4ECh. 7.3 - Prob. 5ECh. 7.3 - Prob. 6ECh. 7.3 - Prob. 7ECh. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Prob. 14ECh. 7.3 - Prob. 15ECh. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Prob. 17ECh. 7.3 - The function f(x,y)=12x2+2xy+9+3y2x+2y has a...Ch. 7.3 - Prob. 19ECh. 7.3 - Prob. 20ECh. 7.3 - Prob. 21ECh. 7.3 - Prob. 22ECh. 7.3 - Prob. 23ECh. 7.3 - Prob. 24ECh. 7.3 - Prob. 25ECh. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Prob. 27ECh. 7.3 - Find all points (x,y) where f(x,y) has a possible...Ch. 7.3 - Prob. 29ECh. 7.3 - Prob. 30ECh. 7.3 - Prob. 31ECh. 7.3 - Prob. 32ECh. 7.3 - Prob. 33ECh. 7.3 - Prob. 34ECh. 7.3 - Find all points f(x,y) has a possible relative...Ch. 7.3 - Prob. 36ECh. 7.3 - Find all points f(x,y) has a possible relative...Ch. 7.3 - Prob. 38ECh. 7.3 - Prob. 39ECh. 7.3 - Find all points f(x,y) has a possible relative...Ch. 7.3 - Prob. 41ECh. 7.3 - Prob. 42ECh. 7.3 - Prob. 43ECh. 7.3 - Prob. 44ECh. 7.3 - Find all points f(x,y) has a possible relative...Ch. 7.3 - Prob. 46ECh. 7.3 - Prob. 47ECh. 7.3 - Prob. 48ECh. 7.3 - Prob. 49ECh. 7.3 - Minimizing Surface Area Find the dimensions of the...Ch. 7.3 - Maximizing Profit A company manufactures and sells...Ch. 7.3 - Maximizing Profit A monopolist manufactures and...Ch. 7.3 - Prob. 53ECh. 7.3 - Revenue from Two Products A company manufactures...Ch. 7.4 - Prob. 1CYUCh. 7.4 - Refer to Exercise 29 of Section 7.3. What is the...Ch. 7.4 - Prob. 1ECh. 7.4 - Prob. 2ECh. 7.4 - Prob. 3ECh. 7.4 - Prob. 4ECh. 7.4 - Prob. 5ECh. 7.4 - Prob. 6ECh. 7.4 - Prob. 7ECh. 7.4 - Prob. 8ECh. 7.4 - Prob. 9ECh. 7.4 - Prob. 10ECh. 7.4 - Prob. 11ECh. 7.4 - Prob. 12ECh. 7.4 - Prob. 13ECh. 7.4 - Prob. 14ECh. 7.4 - Prob. 15ECh. 7.4 - Prob. 16ECh. 7.4 - Prob. 17ECh. 7.4 - Solve the following exercises by the method of...Ch. 7.4 - Prob. 19ECh. 7.4 - Solve the following exercises by the method of...Ch. 7.4 - Prob. 21ECh. 7.4 - Prob. 22ECh. 7.4 - Solve the following exercises by the method of...Ch. 7.4 - Solve the following exercises by the method of...Ch. 7.4 - Prob. 25ECh. 7.4 - Prob. 26ECh. 7.4 - Prob. 27ECh. 7.4 - Prob. 28ECh. 7.4 - Prob. 29ECh. 7.4 - Prob. 30ECh. 7.4 - Prob. 31ECh. 7.4 - Use Lagrange multipliers to find the three...Ch. 7.4 - Minimizing Surface Area Find the dimensions of an...Ch. 7.4 - Maximizing Volume A shelter for use at the beach...Ch. 7.4 - Prob. 35ECh. 7.4 - Prob. 36ECh. 7.5 - Prob. 1CYUCh. 7.5 - Prob. 2CYUCh. 7.5 - Prob. 1ECh. 7.5 - Find the least-squares error E for the...Ch. 7.5 - Prob. 3ECh. 7.5 - Prob. 4ECh. 7.5 - Prob. 5ECh. 7.5 - Prob. 6ECh. 7.5 - Prob. 7ECh. 7.5 - Prob. 8ECh. 7.5 - Prob. 9ECh. 7.5 - Prob. 10ECh. 7.5 - In the remaining exercises, use one or more of the...Ch. 7.5 - In the remaining exercises, use one or more of the...Ch. 7.5 - Prob. 13ECh. 7.5 - Prob. 14ECh. 7.5 - Prob. 15ECh. 7.6 - Calculate the iterated integral 02(0x/2e2yxdy)dx.Ch. 7.6 - Prob. 2CYUCh. 7.6 - Prob. 1ECh. 7.6 - Prob. 2ECh. 7.6 - Prob. 3ECh. 7.6 - Calculate the following iterated integrals....Ch. 7.6 - Prob. 5ECh. 7.6 - Calculate the following iterated integrals....Ch. 7.6 - Calculate the following iterated integrals....Ch. 7.6 - Calculate the following iterated integrals....Ch. 7.6 - Prob. 9ECh. 7.6 - Prob. 10ECh. 7.6 - Prob. 11ECh. 7.6 - Prob. 12ECh. 7.6 - Prob. 13ECh. 7.6 - Calculate the volumes over the following regions R...Ch. 7 - Give an example of a level curve of a function of...Ch. 7 - Prob. 2FCCECh. 7 - Prob. 3FCCECh. 7 - Prob. 4FCCECh. 7 - Prob. 5FCCECh. 7 - Prob. 6FCCECh. 7 - Prob. 7FCCECh. 7 - Prob. 8FCCECh. 7 - Prob. 9FCCECh. 7 - Prob. 10FCCECh. 7 - Prob. 11FCCECh. 7 - Prob. 12FCCECh. 7 - Prob. 1RECh. 7 - Prob. 2RECh. 7 - Prob. 3RECh. 7 - Prob. 4RECh. 7 - Prob. 5RECh. 7 - Prob. 6RECh. 7 - Prob. 7RECh. 7 - Prob. 8RECh. 7 - Prob. 9RECh. 7 - Prob. 10RECh. 7 - Prob. 11RECh. 7 - Prob. 12RECh. 7 - Prob. 13RECh. 7 - Let fx,y=2x3+x2yy2. Compute 2fx2,2fy2, and 2fxy at...Ch. 7 - Prob. 15RECh. 7 - Prob. 16RECh. 7 - Prob. 17RECh. 7 - In Exercises 1720, find all points (x,y) where...Ch. 7 - Prob. 19RECh. 7 - In Exercises 1720, find all points (x,y) where...Ch. 7 - In Exercises 2123, find all points (x,y) where...Ch. 7 - Prob. 22RECh. 7 - Prob. 23RECh. 7 - Find the values of x,y,z at which...Ch. 7 - Prob. 25RECh. 7 - Prob. 26RECh. 7 - Prob. 27RECh. 7 - Prob. 28RECh. 7 - Use the method of Lagrange multiplier to: A person...Ch. 7 - Use the method of Lagrange multiplier to: The...Ch. 7 - Prob. 31RECh. 7 - Prob. 32RECh. 7 - Prob. 33RECh. 7 - Prob. 34RECh. 7 - Prob. 35RECh. 7 - Prob. 36RECh. 7 - Prob. 37RECh. 7 - Prob. 38RE
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Finding Local Maxima and Minima by Differentiation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=pvLj1s7SOtk;License: Standard YouTube License, CC-BY