1. Hi, I'm confused on the method of calculating the power of the sawtooth function. In my textbook the the general formula for claculating the power is definition 1. http://img210.imageshack.us/img210/5091/75697758.jpg [Broken] where the limit approaches infinity and the limits are -T/2 to T/2. For periodic function they say this can be simplfiied to just definition 2. http://img156.imageshack.us/img156/5962/54601684.jpg [Broken] so now the T value is actually the period (finite), and the limits are also the finite numbers where the period is from. For the SAWTOOTH function I know it is periodic so doing with the function equal to f(x) = Ax from for example -1 to 1 (period) and so T = 2 gets the answer that the power is Px = A^2/3 If i just use the general formula I get infinity!!! so for periodic functions is it NECESSARY that you HAVE to use definition 2, and you cannot use definition 1? example when I use defintion 1 for the saw tooth i get lim 1/T A^2 [t^3/3)] limits are from T/2 to - T/2 T-> infinity so you get lim 1/T A^2 (T^3/4) T-> infinity = lim A^2 (T^2/4) T-> infinity = infinity!!