Question

if the sum of the first m terms of an ap is n and the sum of its n terms is m then the sum of its (m+n) terms will be ??​

Answer 1

Answer:

If the sum of first m terms of an arithmetic progression is n and the sum of first n terms of that arithmetic progression is m then show that the sum of first m + n terms of that arithmetic progression is – (m + n). ... So it means that we have to use the formula of sum of arithmetic progression which is given below.