Question: Mark $(\sqrt{ })$ against the correct answer in the following:
$f(\mathrm{x})=\mathrm{x}^{2} \mathrm{e}^{-\mathrm{x}}$ is increasing in
A. $(-2,0)$
B. $(0,2)$
C. $(2, \infty)$
D. $(-\infty, \infty)$
Solution:
But in the interval $(0,2)$ the function is increasing.
