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

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

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

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.

For sequence (t_(n)), if S_(n)=5(2^(n)-1) then t_(n)= . . .

If for a sequence (t_n) , S_n = 2n^2 + 5 , find t_n and show that the sequence is an A.P.

Show that the sequence t_(n) defined by t_(n)=2*3^(n)+1 is not a GP.

Show that the sequence t_(n) defined by t_(n)=2*3^(n)+1 is not a GP.