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

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1. Mar 30, 2016

### Debdut

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. Mar 30, 2016

### HallsofIvy

Staff Emeritus
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 $e^{-s}X(s)$ or get it from a table of transforms.

3. Mar 30, 2016