The function f defined by \[f(x)=(x+2){{e}^{-x}}\] is [IIT Screening 1

1.	The function f defined by \[f(x)=(x+2){{e}^{-x}}\] is [IIT Screening 1994]
A.	Decreasing for all x
B.	Decreasing in \[(-\infty ,\,-1)\] and increasing in \[(-1,\infty )\]
C.	Increasing for all x
D.	Decreasing in \[(-1,\,\infty )\] and increasing in \[(-\infty ,\,-1)\]
Answer» E.

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The function f defined by \[f(x)=(x+2){{e}^{-x}}\] is [IIT Screening 1994]

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