when is function increasing/decreasing

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March 29th 2009, 01:13 AM
IronMan21

when is function increasing/decreasing

Solve without calculator:

when is $f(x)=x^4-3x^3+2x^2-2$ increasing/decreasing?
March 29th 2009, 02:30 AM
running-gag

Quote:

Originally Posted by IronMan21

Solve without calculator:

when is $f(x)=x^4-3x^3+2x^2-2$ increasing/decreasing?

Hi

Do you know how to take the derivative ?

$f'(x)=4x^3-9x^2+4x=x(4x^2-9x+4)$

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