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Finding the Fourier Transform from a Function

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Find the Fourier transfrom of the following function:
f(t) = te^(-2t), for t > 0

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Plug into the fourier transform..

F(w)= [integral 0-->infinity] of f(t)*(e^-jwt) ...

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Fourier Transform of a Square Wave

A square pulse of height H extends from . Find its Fourier transform.
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