Question

Sa se determine multimea valorilor functiei f:D -> R : f(x) =xpatrat - 2

Answer 1

f:D->R, f'(x)=$x^{2} -2$
$x^{2} -2=t$]
$x^{2} =t+2$
$x= \sqrt{t+2}$
deci E(f)=[-2;∞]