(Q21).Write three terms of the G.P. when the first term ‘a’ and the common ratio ‘r’ are given.
(iv) a =
1
64
; r = 2.
Given: a =
1
64
; r = 2.
a
1
= a =
1
64
a
2
= ar =
1
64
×
=
1
a
3
= ar
2
=
1
64
×
2
=
1
64
×
=
1
∴ The G.P is
1
,
1
,
1
, .....
Clear