The problem statement: Obtain a Fourier Series Expression Form from the above graph: I can't post the graph, so I will describe it. It's a periodic function with period 1 and magnitude 5. The equation is the following: [itex]f(x) = -x, -1/2<x<1/2[/itex] I'm really stuck at trying to obtain a series expression. I really don't know how to start this problem. If anyone can tell me how to approach it I would appreciate it.