(Q4).For each geometric progression find the common ratio ‘r’, and then find a
n
.
(i) 3,
3
2
,
3
4
,
3
8
,......
Given G.P.: 3,
3
2
,
3
4
,
3
8
,......
a =
, r =
a
2
a
1
=
=
a
n
= a.r
n-1
=
× (
)
n-1
∴ r =
; a
n
=
(
)
n-1
Clear