Existence oF Fourier Co-efficient

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SUMMARY

The discussion centers on the properties of Fourier series coefficients related to specific conditions of a periodic function f(t) with period T. It is established that if f(t + T/2) = f(t), the Fourier series representation will not include odd harmonics, as the odd Fourier coefficients are proven to be zero. Conversely, if f(t + T/2) = -f(t), the representation will exclude even harmonics, as the even Fourier coefficients are also zero. These conclusions are derived from the definitions of Fourier series coefficients and their symmetry properties.

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Homework Statement



Let f(t) be a signal whose time period is T.

1. if f(t+T/2)=f(t) proof that the Fourier series representation will contain no odd harmonics
2. if f(t+T/2)=-f(t) proof that the Fourier series representation will contain no even harmonics

Homework Equations





The Attempt at a Solution



1. I tried to proof that for f(t+T/2)=f(t) odd Fourier co-efficient is zero . But I can not prove that .
 
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You should write down the definition of the Fourier series coefficients. Then take a good look at them and try to argue that they are 0 for odd numbers, given that f(t+T/2)=f(t). If you can't figure it out: what is the definition of the coefficients?
 

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