Homework Help: Calculus

Posted by Rudy on Tuesday, October 30, 2012 at 11:58pm.

1. Find all relative extrema of the function f(x)=x^(6/7)-3. Use the Second Derivative Test where applicable.
2. Find all relative extrema of the function f(x)=2x^4-16x^3+4. Use the Second Derivative Test where applicable.

Calculus - Steve, Wednesday, October 31, 2012 at 10:49am
as you know,
extrema where f'=0 and f''≠0

1.
f' = 6/7 x^(-1/7) is never zero

2.
f' = 24x^2 - 96x = 24x(x-4)
f'' = 48x

should be easy now to locate extrema

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