√99以上 f(x y z)=x^2 y^2 z^2 graph 299964-F x y z x 2 y 2 z 2 graph
Z=x^2y^2 WolframAlpha Volume of a cylinder?Subject to the constraint 2x2 (y 1)2 18 Solution We check for the critical points in the interior f x = 2x;f y = 2(y1) =)(0;For all x;y 2C, x 6= y, and 2(0;1), then we say that f(x) is strictly concave Intuitively, the graph of a convex function lies on or below any chord between two points on the graph Surfaces Part 2 F x y z x 2 y 2 z 2 graph