proof please. thanks!

Introduce on the coordinate t with values in 10,47 so that the corresponding angle coordinate is 0+21% mod 2172. The sequence {befazo of Berneutli polynomials is defined by the crditions: I) 64 (X) = KB-1(x) I) B4 (0)=B (1) for k21 *) 0,1X) -+- a) compute the first six Bernoulli polynomials. 6) Find the Fourier cocfficients of Bernoulli polynomials. Introduce on the coordinate t with values in 10,47 so that the corresponding angle coordinate is 0+21% mod 2172. The sequence {befazo of Berneutli polynomials is defined by the crditions: I) 64 (X) = KB-1(x) I) B4 (0)=B (1) for k21 *) 0,1X) -+- a) compute the first six Bernoulli polynomials. 6) Find the Fourier cocfficients of Bernoulli polynomials