Homework Help: calculus

Posted by Layton on Thursday, March 19, 2009 at 2:17pm.

f(x)= 7-5x^4

How would find the the absolute max and the x value?

I think you have to take the derivative which is
-20x^3
but then I am lost??

calculus - bobpursley, Thursday, March 19, 2009 at 3:00pm
set it to zero.
f(x)=0=-20x^3 which means max occurs at zero. THe absolute max must then be
f(0)=7-0

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