signal x[n] frequency sequence

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purejoker

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hi there, im new to this forums, so i would like to say hello to everyone! i have been using this forums to answer my questions for some time and have found most of them on this forums, so i would like to say thanks to you guy!
i have one question which i am stuck on, this question im doing is revision for my exams, i would like guidance on how to go about answering the question.

Question:
a signal x[n] consists of signal complex exponential of frequency ω. Evaluate the sequence:
{x[0], x[1], x[3], x[4]}

and calculate the 4-point DFT when the frequency of x[n] is:
ω = ωs/4 i.e ¼ of the sampling frequency

i know that :
ωs = (2Π)s/T

but i dont know what to do next...

if someone can help i would appreciate it....


thanks in advance


pure!

\]
 

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