Question: please help me with these problems im confsued and dont know what to do 1. Given /(x)= L-x, Os x SL, find the expression of

please help me with these problems im confsued and dont know what to do

please help me with these problems im confsued
1. Given /(x)= L-x, Os x SL, find the expression of a cosine series with period 21. 2. Given f(x) = 2 - x',0 s x s 2, determine whether / is even / odd, and find its cosine series, where 7 - 4. 3. Given the Fourier series forf (x) = X-25x

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