Question

Find the indicated sum of the geometric series.

Answer 1

\[\sum_{k=1}^{6} -3\left( 2 \right)^{k-1}\]

Answer 2

\[S_n=a_1\frac{1-r^n}{1-r}\]

Answer 3

what would be r?

Answer 4

r is what is being powered up in the setup ... so, 2

Answer 5

ohhhh ok

Answer 6

\[S_6=-3\frac{1-2^6}{1-2}\]

Answer 7

-189?