Question

What is the sum of an 8-term geometric series if the first term is 14 and the last term is -3,919,104?

Answer 1

the rule is ar^n-1=Xn

Answer 2

for the term

Answer 3

and a is the first term so it will be equal 14

Answer 4

14r^n-1=14r^7=the last term

Answer 5

then take the value of r and put it in the sum of series rule = a/1-r