Homework Help: 12th grade calculus

Posted by dt on Tuesday, November 4, 2008 at 11:22pm.

Let f(x)=[x^3-9x]

[] --- absolute value

a. does f'(x) exist?
b. does f'(3) exist?
c. does f'(-3) exist?
d. determine all extrema of f.

12th grade calculus - bobpursley, Wednesday, November 5, 2008 at 12:08am
I will be happy to critique your thinking. Remember, you need to work on either side of x=3 here, and on either side of x=-3.
12th grade calculus - gansh, Thursday, November 6, 2008 at 3:46am
d

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