# DTFT question

by l46kok
Tags: dtft
 P: 296 1. The problem statement, all variables and given/known data Compute the DTFT of the following signal. $$x[n] = (0.8)^n u[n]$$ 2. Relevant equations Properties of DTFT 3. The attempt at a solution Well, my professor tells me to use the properties of DTFT to solve this. I'd love to - except I don't know what the DTFT of $$(0.8)^n$$ is. I've tried looking it up on the DTFT table, but couldn't find any, can someone tell me what it is?
 HW Helper P: 4,125 It's in the DTFT pairs here: http://www.neng.usu.edu/classes/ece/...transforms.pdf on page 20. but maybe the prof wants you to derive it from the properties you already have in your text?

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