(Q8).Find the indicated term of each geometric progression.
(i) a
1
= 9; r =
1
3
; find a
7
.
a
n
= a . r
n-1
a
7
=
× (
1
)
7-1
=
2
× (
1
)
6
=
2
6
=
1
4
∴ a
7
=
1
4
Clear