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Q. $\int\limits_{0}^{1} \frac{x e^{x}}{(2+x)^{3}} d x$ is equal to

KCETKCET 2022Integrals

Solution:

$\int\limits_{0}^{1} e^{x}\left[\frac{1}{(x+2)^{2}}-\frac{2}{(x+2)^{3}}\right] d x$
$=\left[\frac{e^{x}}{(x+2)^{2}}\right]_{0}^{1}=\frac{e}{9}-\frac{1}{4}$