Points q8. a periodic function f(x) satisfying the condition f(x+1)= f(x) is graphed in the figure shown. s(x) -1/2 1/2 if the fourier series of this function i

points Q8. A periodic function f(x) satisfying the condition f(x+1)= f(x) is graphed in the figure shown. S(x) -1/2 1/2 If the Fourier series of this function is written as S)-a,+« coS nTX b, sin then the value of 9r'a, is