Friday
March 27, 2015

Homework Help: calculus

Posted by thomas on Sunday, April 7, 2013 at 8:47pm.

Please help!!
*f(x)= x(x+6)^1/2 find two x intercepts.
Then show that f'(x)=0 at some point between the 2 x intercepts.
*Use mean value theorem for f(x)= x(x^2-3x+1) for interval [1,4]
I FOUND DERIAVITIVE WHICH IS 3X^2-6X+1.THEN?
*find all critical numbers find all intervals on which the function is increasing or decreasing. lable extrma.
I FOUND MY DERIVATIVE WHICH IS -32X/(X^2-16)^2
CRITICAL NUMBERS ARE 0,4 AND -4.
SO WHAT DO i DO NEXT

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