1.

Find the (L^{-1} ( frac{1}{(s^2+4)(s^2+9)}) ).

A. ( frac{1}{5} left ( frac{sin u2061(2t)}{2}- frac{sin u2061(t)}{3} right ) )
B. ( frac{1}{5} left ( frac{sin u2061(2t)}{2}+ frac{sin u2061(3t)}{3} right ) )
C. ( frac{1}{5} left ( frac{sin u2061(t)}{2}- frac{sin u2061(3t)}{3} right ) )
D. ( frac{1}{5} left ( frac{sin u2061(2t)}{2}- frac{sin u2061(3t)}{3} right ) )
Answer» E.


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