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I How to find Y(s)/X(s)

  1. Mar 30, 2016 #1
    y(t) = u(t - a) . x(t)
    u(t) is a unit step function. I have to find Y(s)/X(s). Do I have to do convolution in frequency domain?
  2. jcsd
  3. Mar 30, 2016 #2


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    First, are we to assume that "X(s)" and "Y(s)" are the Laplace transforms of x(t) and y(t)? I don't see any reason why you just cannot calculate directly that the Laplace transform of y(t) is [itex]e^{-s}X(s)[/itex] or get it from a table of transforms.
  4. Mar 30, 2016 #3
    Thanks for the quick reply.
    Do you mean e-asX(s). But that is the laplace of x(t - a).
    Am I wrong?
  5. Mar 30, 2016 #4
    Found an article where they're saying Y(s) should be Y(s) = e-as . Laplace{x(t + a)}
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