Let function f be defined by:
$$f(t)= \frac{4t(τ-t)}{τ^2} $$ in the interval [0 , τ].
Find a Fourier Series Expansion for that particular function.
I am having some issues solving this; I don't have any attempts because I'm not sure how to deal with this particular equation when trying to define my coefficients.
If you possibly can, show your work step-by-step and how you reached your answer.
Any sort of help would be appreciated!