Posted by Ashley on Wednesday, November 9, 2011 at 6:48pm.
Increasing where f' > 0
Decreasing where f' < 0
f'(x) = 24x^2 + 4x^3 = 4x^2(6+x)
Concave up where f'' > 0
Concave down where f'' < 0
f'' = 48x - 12x^2 = 12x(4-x)
Max where f' = 0 and f'' < 0
Min where f' = 0 and f'' > 0
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