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OpenStudy (anonymous):
What are the critical values of f(x)=8x^3-18x^2-240x+7
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OpenStudy (anonymous):
poly. are continuous on (-infinity, infinity), so, find f'(x), set = 0, and solve.
OpenStudy (anonymous):
does that make sense?
OpenStudy (anonymous):
24x^2-36x-240=0 2x^2-3x-20=0 x=-5/2, x=4
OpenStudy (anonymous):
you bet.
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