Question

find the sum of the geometric series 6Σ3i i=2

Answer 1

$

\sum_{3}^{6}2=\sum_{0}^{3}2=2+2+2=\boxed{6}

$

Or did you mean:

$

6\times\sum{3i}=6\times\sum{6}=6\times6=\boxed{36}$