Question: ind the n'th Fourier approximation for f(a) = x on the interval [-7, 7]. Assume that your approximation converges to f(x) = x when x

ind the n'th Fourier approximation for f(a) = x on the interval [-7, 7]. Assume that your approximation converges to f(x) = x when x E (-7, 7). Use this series to argue that: E(-1) #+1 7T 2k - 1 4 k=1
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