Question
If $f$ has a minimum value at $c,$ show that the function $g(x)=-f(x)$ has a maximum value at $c .$
Step 1
This means that $f'(c) = 0$ and $f(c) \leq f(x)$ for all $x$. Show more…
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If $f$ has a local minimum value at $c,$ show that the function $g(x)=-f(x)$ has a local maximum value at $c .$
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