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October 21, 2014

October 21, 2014

Posted by **Keya** on Thursday, January 12, 2012 at 6:05pm.

- Calculus -
**Reiny**, Thursday, January 12, 2012 at 8:03pmIt will be concave down if f''(x) < 0

take the second derivative, and solve for f''(x) < 0

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