I need help
let $h: ℝ → ℝ$ be a limited function and let :
$L_1:ℝ → ℝ, x → xh (x)$
$L_2:ℝ → ℝ, x → x²h (x)$
The problems: examine $L_1$ and $L_2$ for differentiability and for continuity at the point $x_0 = 0$.
I don't know how to start and what follows after the limitedness of $h$?