Question

show that the sequence:an=2n^2+1 is not an A.P.

Answer 1

see the attachment pic for the answer

Answer 2

Step-by-step explanation:

to prove a given sequence is not in ap we just have to find the values of at least the first 3 terms, after that you find the common difference of first term and second term  , also find the common difference of second term and third term . If common difference is same then it is in ap. if not then it is not an ap