(a) Show that the function f(x, y) = 4xy x4 y4 has critical points at (0, 0), (1, 1)
Chapter 7, Problem 11(choose chapter or problem)
(a) Show that the function f(x, y) = 4xy x4 y4 has critical points at (0, 0), (1, 1), and (1, 1). (b) Use the Hessian form of the second derivative test to show that f has relative maxima at (1, 1) and (1, 1) and a saddle point at (0, 0).
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