Making algebra encyclopedically accessible

Algebra II Exercise: Geometric Series

By B Horn

Find the sum of the first 10 terms of the following geometric series.

9 + 36 + 144 + 576 + ...

-6 + -30 + -150 + -750 + ...

8 + 56 + 392 + 2744 + ...

4 + 12 + 36 + 108 + ...

-6 + 18 + -54 + 162 + ...

1 + 5 + 25 + 125 + ...

-6 + -18 + -54 + -162 + ...

6 + -12 + 24 + -48 + ...

8 + -40 + 200 + -1000 + ...

-2 + -4 + -8 + -16 + ...