pi-180-pi-3-141-pi-Solve-find-n-N-k-1-sin-2-k-10-n-pi-k-k-1-sin-2-k-10-n-e-k-0-

Question Number 9407 by geovane10math last updated on 06/Dec/16

π = 180 ° = Π

π = 3, 141 \dots = π

Solve (find n \in N) :

\underset{k = 1}{\sum^{\infty}} \frac{\sin (2 Π k \cdot 10^{n} π)}{k} + \underset{k = 1}{\sum^{\infty}} \frac{\sin (2 Π k \cdot 10^{n} e)}{k} = 0