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OpenStudy (anonymous):
need help on the attachment
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OpenStudy (anonymous):
OpenStudy (ybarrap):
3) http://www.wolframalpha.com/input/?i=6+%2B+7x+%2B+10x2+-+%2838%2F3%29x3+-%284%2F3%29x4
OpenStudy (ybarrap):
Note that the zeros of the second derivative define region of concavity. Positive concavity or upward concavity occurs between -5 and 1/4: http://www.wolframalpha.com/input/?i=%28+6+%2B+7x+%2B+10x2+-+%2838%2F3%29x3+-%284%2F3%29x4%29%27%27
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