Exercise

EXERCISES 2.5

1. Expand f(x) = x-x² as a Fourier series in -1 < x < 1 and using this series find the r.m.s value of f (x) in the interval.

3 Find the Fourier series of period 2л for the function

4. Obtain the sine series for f(x) = c in the interval 0 < x < л.