Question

infinity series

Answer 1

\[\sum_{n=2}^{\infty}-3/8^{n}\]

Answer 2

\[\sum_{n=0}^{\infty}\left(-\frac{3}{8}\right)^k=\frac{1}{1+\frac{3}{8}}\]
compute this, subtract first two terms

Answer 3

8/11

Answer 4

is the answer for the one i put originally 3/88?