The sum of first m terms of an AP is `(4m^2-m)` If its nth term is 107, find the value of n. Also find the 21st term of this AP

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.

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.

The sum of first n terms of an AP is 5n^2 + 3n If its mth term is 168, find the value of m. Also find the 20th term of the AP.

The sum of first n terms of an A.P. is 5n^(2) + 3n . If the nth term is 168, find the value of n. Also find the 20th term of the A.P.

The sum of first n terms of an AP is 4n^(2)+2n Find 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

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 3n^(2)+5n and its mth term is 164, find the value of m.

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.

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