2. Let f(x) be a function of period 27 such that f(r) = over the interval 0 < x < 2n. 2 a) Sketch a graph of f(x) in the interval 0 < x < 4n b) Show that the Fourier series for f(x) in the interval 0 < x < 2ñ is 1 sin x +, sin 2x + , sin 3x + 2 | c) By giving an appropriate value to x, show that 1 1 1 1 1 %D 4 5

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A: Explanation of the answer is as follows

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