f(x) is a continous function in R.

i need to prove that if f(x)>=x^{2}for every x at R, so f(X) gets a minimum at [0,infinty).

thanks!

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- Apr 9th 2013, 12:32 PMorirquestion
f(x) is a continous function in R.

i need to prove that if f(x)>=x^{2}for every x at R, so f(X) gets a minimum at [0,infinty).

thanks! - Apr 9th 2013, 02:03 PMPlatoRe: question
- Apr 11th 2013, 11:53 AMorirRe: question
but isn't it still a minimum?

after all, still f(x0)<=f(x) [for every x at [0,infinity)]

or not? - Apr 11th 2013, 12:02 PMPlatoRe: question