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?

-32,766
-19,662
19,662
32,766

Answer 1

@mathsmind

Answer 2

I only have 4 problems left till I finish my unit. so i have 4 more i need help with

Answer 3

ok i will assume u know the rule for summing GS, so now let's find a, and r

Answer 4

n=7

Answer 5

that is the correct answer -19,662

Answer 6

first term a=-6

Answer 7

@tinaballerina