# Homework Help: Fourier Transform integral

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1. Oct 13, 2018

### Martin89

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Hi All! I've been looking at this Fourier Transform integral and I've realised that I'm not sure how to integrate the exponential term to infinity. I would expect the result to be infinity but that wouldn't give me a very useful function. So I've taken it to be zero but I have no idea if you can do this...
Thanks!!!

2. Oct 13, 2018

### Cryo

With your current limits (with $-\infty$) what you have done is wrong. The exponential will blow up at negative times. The integral will not converege.

3. Oct 14, 2018

### Martin89

Thanks, I realise my mistake now. The limits should be zero to infinity as negative time is not possible