Problem 1QCE: Letfx,y=xsinxy.Thenfxx,y=andfyx,y=. Problem 2QCE: The slope of the surface z=xy2 in the x-direction at the point 2,3is, and the slope of this surface... Problem 3QCE: The volume V of a right circular cone of radius r and height h is given by V=13r2h. (a) Find a... Problem 4QCE Problem 1ES: Let fx,y=3x3y2. Find afxx,ybfyx,ycfx1,ydfxx,1efy1,yffxx,1gfx1,2hfy1,2 Problem 2ES: Let z=e2xsiny. Find. az/xbz/ycz/x0,ydz/xx,0ez/y0,yfz/yx,0gz/xln2,0hz/yln2,0 Problem 3ES Problem 4ES Problem 5ES Problem 6ES Problem 7ES Problem 8ES Problem 9ES: Evaluate the indicated partial derivatives. z=sin5x2y+7xy2;zx,zy Problem 10ES Problem 11ES: Let fx,y=3x+2y. (a) Find the slope of the surface z=fx,y in the x-direction at the point 4,2. (b)... Problem 12ES: Let fx,y=xey+5y. (a) Find the slope of the surface z=fx,y in the x-direction at the point 3,0. (b)... Problem 13ES: Let z=siny24x. (a) Find the rate of change of z with respect to x at the point 2,1 with y held... Problem 14ES: Let z=x+y1. (a) Find the rate of change of z with respect to x at the point 2,4 with y held fixed.... Problem 15ES: Use the information in the accompanying figure to find the value of the first-order partial... Problem 16ES Problem 17ES Problem 18ES: Use the table in Exercise 17 and the method of Example 6 to estimate (a) the partial derivative of r... Problem 19ES Problem 20ES: What can you say about the sign of z/x,2z/x2,z/y,and2z/y2 at the point P in the accompanying figure?... Problem 21ES: Determine whether the statement is true or false. Explain your answer. If the line y=2 is a contour... Problem 22ES: Determine whether the statement is true or false. Explain your answer. If the plane x=3 intersects... Problem 23ES: Determine whether the statement is true or false. Explain your answer. If the graph of z=fx,y is a... Problem 24ES: Determine whether the statement is true or false. Explain your answer. There exists a polynomial... Problem 25ES: Find z/xandz/y. z=4ex2y3 Problem 26ES: Find z/xandz/y. z=cosx5y4 Problem 27ES: Find z/xandz/y. z=x3ln1+xy3/5 Problem 28ES: Find z/xandz/y. z=exysin4y2 Problem 29ES: Find
Problem 30ES: Find z/xandz/y. z=x2y3x+y Problem 31ES: Find fxx,yandfyx,y. fx,y=3x5y7x3y Problem 32ES: Findfxx,yandfyx,y. fx,y=x+yxy Problem 33ES: Find fxx,yandfyx,y. fx,y=y3/2tan1x/y Problem 34ES: Find fxx,yandfyx,y. fx,y=x3ey+y3secx Problem 35ES: Find fxx,yandfyx,y. fx,y=y2tanx4/3 Problem 36ES: Find fxx,yandfyx,y. fx,y=coshxsinh2xy2 Problem 37ES Problem 38ES Problem 39ES Problem 40ES Problem 41ES: Letfx,y,z=x2y4z3+xy+z2+1.Findafxx,y,zbfyx,y,zcfzx,y,zdfx1,y,zefy1,2,zffz1,2,3. Problem 42ES: Letw=x2ycosz.Findaw/xx,y,zbw/yx,y,zcw/zx,y,zdw/x2,y,zew/y2,1,zfw/z2,1,0. Problem 43ES: Findfx,fyandfz.fx,y,z=zlnx2ycosz Problem 44ES: Findfx,fyandfz. fx,y,z=y3/2secxzy Problem 45ES: Findfx,fyandfz. fx,y,z=tan11xy2z3 Problem 46ES: Findfx,fyandfz. fx,y,z=coshzsinh2x2yz Problem 47ES Problem 48ES Problem 49ES Problem 50ES Problem 51ES: Letfx,y,z=y2exz.Findaf/x1,1,1bf/y1,1,1cf/z1,1,1. Problem 52ES: Letw=x2+4y2z2.Findaw/x2,1,1bw/y2,1,1cw/z2,1,1 Problem 53ES: Let fx,y=excosy. Use a graphing utility to graph the functionsfx0,yandfyx,/2. Problem 54ES: Let fx,y=exsiny. Use a graphing utility to graph the functions fx0,yandfyx,0. Problem 55ES: A point moves along the intersection of the elliptic paraboloid z=x2+3y2 and the plane y=1. At what... Problem 56ES: A point moves along the intersection of the elliptic paraboloid z=x2+3y2 and the plane x=2. At what... Problem 57ES: A point moves along the intersection of the plane y=3 and the surface z=29x2y2. At what rate is z... Problem 58ES: Find the slope of the tangent line at 1,1,5 to the curve of intersection of the surface z=x2+4y2 and... Problem 59ES: The volume V of a right circular cylinder is given by the formula V=r2h, where r is the radius and h... Problem 60ES: The volume V of a right circular cone is given by V=24d24s2d2 where s is the slant height and d is... Problem 61ES Problem 62ES Problem 63ES: The length, width, and height of a rectangular box are l=5,w=2,andh=3, respectively. (a) Find the... Problem 64ES: The area A of a triangle is given by A=12absin, where a and b are the lengths of two sides and is... Problem 65ES: The volume of a right circular cone of radius r and height h is V=13r2h. Show that if the height... Problem 66ES: Find parametric equations for the tangent line at 1,3,3 to the curve of intersection of the surface... Problem 67ES: (a) By differentiating implicitly, find the slope of the hyperboloid x2+y2z2=1 in the x-direction at... Problem 68ES: (a) By differentiating implicitly, find the slope of the hyperboloid x2+y2z2=1 in the y-direction at... Problem 69ES: Calculate z/xandz/y using implicit differentiation. Leave answer in terms of x,y,andz. x2+y2+z23/2=1 Problem 70ES: Calculate z/xandz/y using implicit differentiation. Leave answer in terms of x,y,andz. ln2x2+yz3=x Problem 71ES: Calculate z/xandz/y using implicit differentiation. Leave answer in terms of x,y,andz. x2+zsinxyz=0 Problem 72ES: Calculate z/xandz/y using implicit differentiation. Leave answer in terms of x,y,andz.... Problem 73ES: Find w/x,w/y,andw/z using implicit differentiation. Leave your answer in terms of x,y,zandw.... Problem 74ES: Find w/x,w/y,andw/z using implicit differentiation. Leave your answer in terms of x,y,zandw.... Problem 75ES: Find w/x,w/y,andw/z using implicit differentiation. Leave your answer in terms of x,y,zandw.... Problem 76ES: Find w/x,w/y,andw/z using implicit differentiation. Leave your answer in terms of x,y,zandw.... Problem 77ES: Findfxandfy. fx,y=yxet2dt Problem 78ES: Findfxandfy. fx,y=1xyet2dt Problem 79ES: Findfxandfy. fx,y=0x2y3et2sint3dt Problem 80ES: Findfxandfy. fx,y=x+yxysint3dt Problem 81ES: z=xcosy.Finda2z/x2b2z/y2c2z/xyd2z/yx. Problem 82ES: Letfx,y=4x22y+7x4y5.Findafxxbfyycfxydfyx. Problem 83ES: Letfx,y=sin3x2+6y2.Findafxxbfyycfxydfyx. Problem 84ES: Letfx,y=xe2y.Findafxxbfyycfxydfyx. Problem 85ES Problem 86ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=x2+y2 Problem 87ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=excosy Problem 88ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=exy2 Problem 89ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=ln4x5y Problem 90ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=lnx2+y2 Problem 91ES: Confirm that the mixed second-order derivatives of f are the same. fx,y=xy/x+y Problem 92ES Problem 93ES: Express the following derivatives in notation. afxxxbfxyycfyyxxdfxyyy. Problem 94ES: Express the derivatives in “subscript� notation. a3fy2xb4fx4c4fy2x2d5fx2y3 Problem 95ES: Given fx,y=x3y52x2y+x,find afxxybfyxycfyyy. Problem 96ES: Given z=2xy5,find a3zyxyb3zx2yc4zx2y2. Problem 97ES: Given fx,y=y3e5x,findafxxy0,1bfxxx0,1cfyyxx0,1. Problem 98ES Problem 99ES: Letfx,y,z=x3y5z7+xy2+y3z.Findafxybfyzcfxzdfzzefzyyffxxygfzyxhfxxyz. Problem 100ES: Letw=4x3y+2z5.Finda2wxzb3wxyzc4wz2yx. Problem 101ES: Show that the function satisfies Laplace’s equation... Problem 102ES: Show that the function satisfies the heat equation zt=c22zx2c0,constantaz=etsinx/cbz=etcosx/c Problem 103ES: Show that the function ux,t=sinctsinx satisfies the wave equation [Equation (6)] for all real values... Problem 104ES: In each part, show that ux,yandx,y satisfy the Cauchy-Riemann equations ux=yanduy=x... Problem 105ES Problem 106ES Problem 107ES: Find the indicated derivatives. f,w,x,y=42w3x4y5;f/,f/w,f/x,f/y Problem 108ES: Find the indicated derivatives. w=rcosst+eusinur;w/r,w/s,w/t,w/u Problem 109ES Problem 110ES: Find the indicated derivatives. V=xe2xy+wezw+yw;V/x,V/y,V/z,V/w Problem 111ES Problem 112ES: Letf,w,x,y=21/2w4x1/2y2/3.Findf1,2,4,8,fw1,2,4,8,fx1,2,4,8,andfy1,2,4,8. Problem 113ES: Findw/xifori=1,2,...,n. w=cosx1+2x2++nxn Problem 114ES: Findw/xifori=1,2,...,n. w=k=1nxk1/n Problem 115ES: Describe the largest set on which Theorem 13.3.2 can be used to prove that fxyandfyx are equal on... Problem 116ES: Describe the largest set on which Theorem 13.3.2 can be used to prove that fxyandfyx are equal on... Problem 117ES: Let fx,y=2x23xy+y2. Find fx2,1andfy2,1 by evaluating the limit in Definition 13.3.1. Then check your... Problem 118ES: Letfx,y=x2+y22/3.Showthatfxx,y=4x3x2+y21/3,x,y0,00,x,y=0,0 Problem 119ES: Let fx,y=x3+y31/3. (a) Show that fy0,0=1. (b) At what points, if any, does fyx,y fail to exist? format_list_bulleted