(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Let f(t) denote a causal signal. Show that L+ {f(−at)} = 0 for any a > 0.

2. Relevant equations

3. The attempt at a solution

I know that the laplace{f(at)} = 1/a*F(s/a)

but by simply placing -a whenever determining the Laplace, my signs gets confused within the integral. So my answer is

1/-a*F(s/a) and not 0

Does anyone know how to do this so the L+ {f(−at)} = 0 ?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Help with Laplace Transform

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