Homework Help: calculus

Posted by Tatoosh on Monday, January 2, 2012 at 1:38pm.

consider the function; f(x)=x^4-3x^2-1
a) Find all the point where f'(x)=0
b) Use the second derivative test to classify the stationary points?

calculus - Steve, Monday, January 2, 2012 at 4:52pm
where do you get stuck?
f' = 4x^3 - 6x
= 2x(2x^2 - 3)

f'' = 12x^2 - 6
= 6(2x^2 - 1)
calculus - Tatoosh, Wednesday, January 4, 2012 at 2:18pm
Thank you so much.
and what about the stationary points ?

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