Question

the sum of first m terms of an AP is 4m^2-m.find its n terms and also 21 terms​

Answer 1

Answer:

Sm=n/2(2a+(n-1)d)

=> 4m^2-m=n/2(2a+(n-1)d)

Step-by-step explanation:

go on and then u will get expression in the terms of m and n.

you get the ans. hope it helps!

CHEERS!!!!