Question

Giúp vói

Answer 1

Ta xác định : \(D=R\)

\(y=x^4-2x^2+1\Rightarrow'y=4x^3-4x=0\Leftrightarrow\left\{{}\begin{matrix}x=0\\x=+1\end{matrix}\right.\)

\(f\left(0\right)=1,f\left(2\right)=9,f\left(1\right)=0\)

\(\Rightarrow maxy_{\left[0;2\right]}=9\)