The Laplace transform of the signal ( frac{d}{dx} )(te-t u(t)) is ___

1.	The Laplace transform of the signal ( frac{d}{dx} )(te^-t u(t)) is ______________
A.	( frac{1}{s(s+1)^2} )
B.	( frac{s}{(s+1)^2} )
C.	( frac{e^{-s}}{s+1} )
D.	( frac{e^{-s}}{(s+1)^2} )
Answer» C. ( frac{e^{-s}}{s+1} )

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