More Infinity series!
Algebra
Level
2
Find the sum (to infinity) of \[ \frac{1}{7} + \frac{2}{7^{2}} + \frac{1}{7^{3}} + \frac{2}{7^{4}} + \frac{ 1}{ 7^5} + \frac{2}{ 7^6} + \ldots \]
by
Mohammad Al Ali