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).
Fourier Series Expansions, Periodic Functions, Graphing and Finding Terms are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.