- #1
ryan.1015
- 14
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Homework Statement
find a cubic function g(x)=ax^3 +bx^2+cx +d that has a local maximum value of 3 at -7 and a local minimum value 0f -9 at 12.
Homework Equations
The Attempt at a Solution
I know the derivative should equal zero for a max or min to occure. So i got f '(x)=(x+7)(x-12). then i got F '(x)=x^2-5x-84 and plugged that into the original equation. I got A=1/3 b=5/2 and c=-84. I'm not sure how to fet D, or if i did this first part right