What is the extreme value of a quadratic function?

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Wataru

Sep 28, 2014

A quadratic function $f(x)=ax^2+bx+c$ has an extreme value at its vertex, so if $a>0$ , then $f(-b/a)$ is the maximum, and if $a<0$ , then $f(-b/a)$ is the minimum.

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What is the extreme value of a quadratic function?

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