If there are `(2n+1)` terms in A.P. , then prove that the ratio of the sum of odd terms and the sum of even terms is `(n+1): n`

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

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

If the ratio of the sum of m terms and n terms of an A.P. be m^2 : n^2 , prove that the ratio of its mth and nth terms is (2m-1): (2n-1) .

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

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

If the sum of m terms of an A.P. is the same as the sum of its n terms, then the sum of its (m+n) terms is (a). m n (b). -m n (c). 1//m n (d). 0

If the sum of m terms of an A.P. is the same as the sum of its n terms, then the sum of its (m+n) terms is (a). m n (b). -m n (c). 1//m n (d). 0