Problem 1E: Describe the appearance of a smooth surface with a local maximum at a point. Problem 2E: Describe the usual appearance of a smooth surface at a saddle point. Problem 3E: What are the conditions for a critical point of a function f? Problem 4E: If fx (a, b) = fy (a, b) = 0, does it follow the f has a local maximum or local minimum at (a, b)?... Problem 5E: Consider the function z = f(x, y). What is the discriminant of f, and how do you compute it? Problem 6E Problem 7E: What is an absolute minimum value of a function f on a set R in 2? Problem 8E: What is the procedure for locating absolute maximum and minimum values on a closed bounded domain? Problem 9E: Critical points Find all critical points of the following functions. 9.f(x, y) = 1 + x2 + y2 Problem 10E: Critical points Find all critical points of the following functions. 10.f(x, y) = x2 6x + y2 + 8y Problem 11E: Critical points Find all critical points of the following functions. 11.f(x, y) = (3x 2)2 + (y 4)2 Problem 12E: Critical points Find all critical points of the following functions. 12.f(x, y) = 3x3 4y2 Problem 13E: Critical points Find all critical points of the following functions. 13.f(x, y) = x4 + y4 16xy Problem 14E: Critical points Find all critical points of the following functions. 14.f(x,y)=x3/3y3/3+3xy Problem 15E: Critical points Find all critical points of the following functions. 15.f(x, y) = x4 2x2 + y2 4y +... Problem 16E Problem 17E: Critical points Find all critical points of the following functions. 17.f(x, y) = x2 + 6x + y2 + 8 Problem 18E Problem 19E Problem 20E Problem 21E Problem 22E Problem 23E Problem 24E Problem 25E: Analyzing critical points Find the critical points of the following functions. Use the Second... Problem 26E: Analyzing critical points Find the critical points of the following functions. Use the Second... Problem 27E Problem 28E Problem 29E: Analyzing critical points Find the critical points of the following functions. Use the Second... Problem 30E: Analyzing critical points Find the critical points of the following functions. Use the Second... Problem 31E Problem 32E Problem 33E: Analyzing critical points Find the critical points of the following functions. Use the Second... Problem 34E Problem 35E: Shipping regulations A shipping company handles rectangular boxes provided the sum of the height and... Problem 36E: Cardboard boxes A lidless box is to be made using 2 m2 of cardboard. Find the dimensions of the box... Problem 37E: Cardboard boxes A lidless cardboard box is to be made with a volume of 4 m3. Find the dimensions of... Problem 38E: Optimal box Find the dimensions of the largest rectangular box in the first octant of the... Problem 39E Problem 40E: Inconclusive tests Show that the Second Derivative Test is inconclusive when applied to the... Problem 41E Problem 42E: Inconclusive tests Show that the Second Derivative Test is inconclusive when applied to the... Problem 43E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 44E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 45E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 46E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 47E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 48E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 49E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 50E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 51E Problem 52E: Absolute maxima and minima Find the absolute maximum and minimum values of the following functions... Problem 53E: Absolute extrema on open and / or unbounded regions If possible, find the absolute maximum and... Problem 54E: Absolute extrema on open and / or unbounded regions If possible, find the absolute maximum and... Problem 55E: Absolute extrema on open and / or unbounded regions If possible, find the absolute maximum and... Problem 56E: Absolute extrema on open and / or unbounded regions If possible, find the absolute maximum and... Problem 57E Problem 58E Problem 59E Problem 60E: Absolute extrema on open and / or unbounded regions 60.Rectangular boxes with a volume of 10 m3 are... Problem 61E: Explain why or why not Determine whether the following statements are true and give an explanation... Problem 62E Problem 63E: Extreme points from contour plots Based on the level curves that are visible in the following... Problem 64E: Optimal box Find the dimensions of the rectangular box with maximum volume in the first octant with... Problem 65E: Lease distance What point on the plane x y + z = 2 is closest to the point (1, 1, 1)? Problem 66E: Maximum/minimum of linear functions Let R be a closed bounded region in 2 and let f(x, y) = ax + by... Problem 67E: Magic triples Let x, y, and z be nonnegative numbers with x + y + z = 200. a.Find the values of x,... Problem 68E: Powers and roots Assume that x + y + z = 1 with x 0, y 0, and z 0. a.Find the maximum and minimum... Problem 69E Problem 70E: Least squares approximation In its many guises, the least squares approximation arises in numerous... Problem 71E Problem 72E Problem 73E Problem 74E: Second Derivative Test Suppose the conditions of the Second Derivative Test are satisfied on an open... Problem 75E: Maximum area triangle Among all triangles with a perimeter of 9 units, find the dimensions of the... Problem 76E: Ellipsoid inside a tetrahedron (1946 Putnam Exam) Let P be a plane tangent to the ellipsoid x2/a2 +... Problem 77E Problem 78E: Slicing plane Find an equation of the plane passing through the point (3, 2, 1) that slices off the... Problem 79E: Two mountains without a saddle Show that the following two functions have two local maxima but no... Problem 80E: Solitary critical points A function of one variable has the property that a local maximum (or... format_list_bulleted