# Math Help - question using Weirestress theorem

1. ## question using Weirestress theorem

$f$ is a continous function at $R$ which gets a local maximum at point $x{}_{0}$. i need to prove - formal proof, not just words - that if $f$ doens't have any other extremas, $f$ gets maximum at $x{}_{0}$

for clarification of how us in the course define extrema: " $f(x)$ is an extrema value if $f(x)$ is a local minimum or a local maximum of $f$. in this case we'd say that the point $(x,f(x))$ on $f$'s graph is called an extrema of $f$"

2. ## Re: question using Weirestress theorem

oh.. the clue is to use the second sentence of Weirestress..