If the sum to n terms of a sequence be `n^2+2n` then prove tht the sequence is an A.P.

If the sum to n terms of a sequence be n^2+2n then prove that the sequence is an A.P.

The nth term of a sequence is 8 -5n. Show that the sequence is an A.P.

If the sum to n terms of a sequences is 2n^(2)+4, find its nth.Is this seqwuence as AP?

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.

If nth term of a sequences is 4n^2+1, find the sequence. Is this sequences at A.P.?

If nth term of a sequences is 4n^(2)+1, find the sequence.Is this sequences at A.P.?

If the sum of n terms of an A.P. is 3n^2 + 2n : Find the rth term.

If the sum of n terms of an A.P. is 2n^2+3n then write its nth term.

The sum of n terms of a series is (3n^(2)+2n) . Prove that it is an A.P.

A sequence is called an A.P if the difference of a term and the previous term is always same i.e if a_(n+1)- a_(n)= constant ( common difference ) for all n in N For an A.P whose first term is 'a ' and common difference is d has n^(th) term as t_n=a+(n-1)d Sum of n terms of an A.P. whose first term is a, last term is l and common difference is d is S_(n) = n/2 (2a +(n-1)d)=n/2 (a+a+(n-1)d)= n/2 (a+l) If sum of n terms S_n for a sequence is given by S_n=An^2+Bn+C , then sequence is an A.P. whose common difference is