Posted by britney on Thursday, November 15, 2012 at 1:23pm.
critical values are values in the domain where f'(x) = 0
since f'(x) = 3x^2 + 6x - 1, the critical values would be (-3±2√3)/2
the extrema occur at the critical values.
oops. f' = 3x^2 + 6x - 2.
extrema at x=(-3±√15)/3
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