Question: Consider the function f(x)=x-1x2, which has first derivative f'(x)=2-zx3 and second derivative f''(x)=2x-6x4.Then the function f isconcave up on (-,0)(3,) and concave down on (0,3)-concave

Consider the function f(x)=x-1x2, which has first derivative f'(x)=2-zx3 and second derivative f''(x)=2x-6x4.Then the function f isconcave up on (-,0)(3,) and concave down on (0,3)-concave up on (0,3)(3,) and concave down on (-,0).concave down on (-,3) and concave up on (3,).concave up on (3,) and concave down on (-,0)(0,3)concave up on (0,3) and concave down on (-,0)(3,).

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