1.

Find the (L^{-1} frac{s}{(s^2+4)^2} ).

A. ( frac{1}{4} tcos(2t) )
B. ( frac{1}{4} tsin(t) )
C. ( frac{1}{4} tsin(2t) )
D. ( frac{1}{2} tsin(2t) )
Answer» D. ( frac{1}{2} tsin(2t) )


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