Question 978022
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An inflection point is the boundary between two regions of the function one of which is concave up and one of which is concave down.  If the second derivative of the function is greater than or equal to zero on an interval, then the function is concave up on that interval.  If the second derivative is less than or equal to zero on an interval, then the function is concave down on that interval.  If a point of inflection exists at c, then it is necessary (but not sufficient) for f"(c) = 0 or f"(c) to not exist.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \