Geometric Series

Match it! Select the correct answer from the pull down...Good luck!

a1 = 2, r = 5, n = 9

a1 = 1, r = 5, n = 7

a1 = 3, r = -4, n = 7

4 + 12 + 36 + 108..., n = 8

a1 = -1, r = 3, n = 8

2 + 12 + 72 + 432..., n = 8

2 + 10 + 50 + 25-..., n = 9

3 - 6 + 12 - 24..., n = 6