Question #217602

L{2(t)H(t-3)}

Expert's answer

L(H(t3))=e3ssL(H(t-3))=\dfrac{e^{-3s}}{s}

L(2H(t3))=2e3ssL(2H(t-3))=2\dfrac{e^{-3s}}{s}

L(2tH(t3))=2(1)1dds(e3ss)L(2tH(t-3))=2(-1)^1\dfrac{d}{ds}(\dfrac{e^{-3s}}{s})

=23se3se3ss2=-2\dfrac{-3se^{-3s}-e^{-3s}}{s^2}

=2(3s+1)e3ss2=\dfrac{2(3s+1)e^{-3s}}{s^2}


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