keinx=-12(12x)-nk=0n-1(n-k-1)!k!sin(34nπ+12kπ)(14x2)k-ln(12x)beinx-14πbernx+12(12x)nk=0ψ(k+1)+ψ(n+k+1)k!(n+k)!sin(34nπ+12kπ)(14x2)k.