(13) Find the coefficients of the trigonometric, symmetric interval Fourier Series for the function: Answer 2 P= π, ao, an = ㅠ f(x) = 1+ (−1)″ π(1 — n²) (0 if r € (-1,0) sin x if x = [0, π] if n + 1, and a₁ = 0, bn = 0 if n #1, and b₁ = 1 2

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