(Q14).Which of the following lists of numbers form GP?

(iii)
1
64
,
1
32
,
1
8
,........

All the terms are non zero

a2
a1
=
1
1
=
a3
a2
=
1
1
=
Here
a2
a1
a3
a2

So, the given list of numbers does not form GP