The nth term of a sequence is given by `a_n=2n^2+n+1.` Show that it is not an A.P.

The n^(th) term of a sequence is given by T_n = 2n + 7. Show that it is an A.P. Also, find its 7^(th) term.

The nth term of a sequence is given by a_n=2n+7. Show that it is an A.P. Also, find its 7th term.

The nth term of a sequence is given by a_n=2n+7. Show that it is an A.P. Also, find its 7th term.

A sequence is given {a_n} by a_n=n^2-1, n in N show that it is not an AP.

A sequence {a_n} is given by : a_n=n^2-1, n in N . Show that it is not an A.P.

A sequence { t_n} is given by t_n=n^2-1, n in N then show that it is not an A.P

A sequence {t_(n)} is given by t_(n)=n^(2)-1,n in N, show that it is not an A.P.

The n^(th) term of a sequence is given by a_n=2n+7 . Prove that the. sequence is an A.P. Also find its common difference.

The n^(th) term of a sequence is given by a_n=4n+7 Is the sequence an A.P?. If yes, find the common difference of the A.P

If the nth term a_n\ of a sequence is given by a_n=n^2-n+1 write down its first five terms.