If `t^n` is the nth term of an A.P. then the value of `t_( n + 1) - tn - 1`​

Write the n t h term of an A.P. the sum of whose n terms is S_n .

If it,be the n^(th) term of an A.P and if t_(7)=9 then the value of the c.d.that would make t_(1)t_(2)t_(7), least is

If the n^(t h) term of an A.P. is 2n+1 , then the sum of first n terms of the A.P. is n(n-2) (b) n(n+2) (c) n(n+1) (d) n(n-1)

Find the sum of n terms of an A.P. whose nth term is (2n+1).

The nth term of an A.P. is (5n-1). Find the sum of its 'n' terms.

If t_n denotes the nth term of an A.P. and t_p= 1/q, t_q= 1/p then which one of the following is necessarily a root of the equation (p+2q-3r)x^2+(q+2r-3p)x+(r+2p-3q)=0 (A) t_p (B) t_q (C) t_(pq) (D) t_(p+q)

Find the sum to n terms of an A.P.whose nth terms is t_(n)=5+6n,n in N

If m times the mth term of an A.P. is equal to n times its nth term, find (m + n) th term of the A.P.:

Sum of the first n terms of an A.P. having positive terms is given by S_n=(1+2T_n)(1-T_n) (where T_n is the nth term of the series). The value of T_2^2 is (A) (sqrt(2)+1)/(2sqrt(2)) (B) (sqrt(2)-1)/(2sqrt(2)) (C) 1/(2sqrt(2)) (D) none of these

Find the sum of 'n' terms of an A.P. whose nth term is 2n+1.