Find at least three nonzero terms [including a0, at least two cosine terms (if they are not all zero) and at least two sine terms (if they are not all zero)] of the Fourier series for the given function.f(x) = -x + ? -? ? x ? ?

A. f(x) = ? - 2 sin x +  sin 2x - . . .
B. f(x) = ? - sin x +  sin 2x - . . .
C. f(x) = ? + 2 sin x -  sin 2x + . . .
D. f(x) = ? - 2 sin x + sin 2x - . . .


Answer: D

Mathematics

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