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    Fourier Series Expansions : Periodic Functions, Graphing and Finding Terms

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    Find the first four terms of the Fourier series expansion of the function f(x) = (1 - (x^2/pi^2))per on the interval (-pi, pi). Make a graph of f(x) with the two Fourier series expansions. Show three periods of f(x).

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    https://brainmass.com/math/fourier-analysis/fourier-series-expansions-periodic-functions-graphing-terms-58188

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