Question

Check whether the sequence defined by an=2n^2+1 is an AP

Answer 1

AP is basically a series where the difference of two consecutive terms is constant.

so for first term we put n=1
then for second we put n=2
and so on.

find 3 to 4 terms and calculate difference between them.
if its constant the given sequence is an AP
p.s I am not doing calculations so sorry