1.

The inverse Laplace transform of F(s) = ( frac{e^{-3s}}{s(s^2+3s+2)} ) is ______________

A. {0.5 + 0.5e<sup>-2(t+3)</sup>-e<sup>-(t+3)</sup>} u (t+3)
B. {0.5 + 0.5e<sup>-2(t-3)</sup>-e<sup>-(t-3)</sup>} u (t-3)
C. {0.5 0.5e<sup>-2(t-3)</sup>-e<sup>-(t-3)</sup>} u (t-3)
D. 0.5 + 0.5e<sup>-2t</sup>-e<sup>-t</sup>)
Answer» C. {0.5 0.5e<sup>-2(t-3)</sup>-e<sup>-(t-3)</sup>} u (t-3)


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