1.

Given F(s) = ( frac{3s+5}{s^2+7} ). The value of L-1{F(s)} is _______________

A. (3 ,cos ( sqrt{7} t) + frac{5}{ sqrt{7}} ,sin ( sqrt{7} ,t) )
B. (3 ,cos ( sqrt{7} t)- frac{5}{ sqrt{7}} sin ( sqrt{7} ,t) )
C. (3 ,cos ( sqrt{7} t) )
D. ( frac{5}{ sqrt{7}} ,sin ( sqrt{7} t) )
Answer» B. (3 ,cos ( sqrt{7} t)- frac{5}{ sqrt{7}} sin ( sqrt{7} ,t) )


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