Asked by Imamu

If the fourth term of GP is 9 and the sixth term is 81.
Find:
1) common ratio.
2) first term
Answered by Reiny
ar^3 = 9
ar^5 = 81
divide them:
r^2 = 9
r = ± 3
take the two cases for r, sub into one of the equations to solve for a
(two sets of answers)
Answered by DEO
I don't see the value of first term of geometric progression
Answered by Flora
I don’t know
Answered by 3
1/3