Question

What is the sum of a 7-term geometric series if the first term is 6, the last term is 24,576, and the common ratio is -4? (1 points)

-32,766

-19,662

19,662

32,766

Answer 1

just apply S = a*[(1 - r^n) / (1 - r)]
r - common ratio
and here n = 7

Answer 2

Huh ?

Answer 3

@famasow what??? i got the answer applyin the same

Answer 4

So i have to plug it in ?

Answer 5

yeah...like a = 6..r = -4 nd n=7

Answer 6

I Got 19662

Answer 7

its correct

Answer 8

OK Thanks So Much