Question

The 10th term of an G.P is 812and the 5th term is 312. What is the common ratio? (in decimals)​

Answer 1

General term of GP: a

1

r

n−1

10

th

term of GP =a

1

r

9

=45(0.2)

9

=23040×10

−9

=2.304×10

−5