1. The problem statement, all variables and given/known data For a sawtooth wave function with a period of P where the first branch of the function is given for [a, a+P) we can say that : f(x)=some expression in x for [a, a+P) f(x+nP)=f(x) 2. Relevant equations 3. The attempt at a solution Why is 'a+P' not included in the x-interval? Wouldn't f(x) equal 1 if x was 1? What would happen if 'a+P' was included in the interval? Thank You.