(Q12).Check whether the resulting lists are AP in each case.
4
7
,
7
7
,
10
7
,
13
7
,
16
7
.......
The first term
∴ d = a
2
– a
1
= a
3
– a
2
= a
4
– a
3
= ….. =
and the above list forms an A.P.
Clear