The function f(x) is defined on the interval (-π, π). If f(x) is written as a complex Fourier series of the form
f(x) = ∑_(n=-∞)^(∞) cₙe^(inx)dx,
show that, for all n,
cₙ = (1)/(2π) ∫_(-π)^(π) f(x)e^(inx)dx
The function f(x) is defined on the interval (-T, T). If f(x) is written as a complex Fourier series of the form
f(x) = ∑_(n=-∞)^(∞) Cₙe^(inx)dx,
show that, for all n,
1/(2T) ∫_(-T)^(T) Cₙxdx