If the sum of `n` terms of an A.P. is `3n^2+5n` and its mth term is 164, find the value of `mdot`

If the sum of n terms of an A.P. is 3n^2+5 and its m^(t h) term is 164, find the value of m.

of math and n'h term is (2 - 1): (2n - 1).If the sum of n terms of an A.P. is 3n? + 5n and its meh term is 164, find the valueof m... 5 – so als Tildara,Insert five numbers between 8 and 26 such that the resulting sequence is an A.P.

If the sum of n terms of an A.P. is 2n^(2)+5n , then its n^(th) term

The sum of first n terms of an A.P. is 5n^2+3n If its mth term is 168, (i) Find the value of m (ii) Find the 20th term of this AP

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 an A.P. is 4n^(2) + 5n. Find the series.

If the sum of first n terms of an A.P. is 3n^2 + 2n , find its r^(th) term.

If the sum of 8 terms of an A.P. is 64 and the sum of 19 terms is 361, find the sum of n terms.

The sum of first m terms of an A.P. is 4m^2-m . If its n t h term is 107, find the value of n . Also, find the 21 s t term of this A.P.

If the sum of 7 terms of an A.P. is 49 and that of 17 terms is 289, find the sum of n terms.