6. for the fourier series of the following function of period 27 (iit jam 2017] sx) t s0 1 0 <1 the ratio (to the nearest integer) of the eourier coefficients o

6. For the Fourier series of the following function of period 27 (IIT JAM 2017] Sx) T S0 1 0 <1 the ratio (to the nearest integer) of the Eourier coefficients of the first and the third harmonic is (a)1 (b) 2 (C 3 (d 6 2