Question

If the sum of first m terms of an A.P is the same as the sum its first n terms , show that the sum of its first (m +n ) terms is zero .​

Answer 1

Answer:

Let a be the first term and d be the common difference of the AP. It is given that the sum of first m terms is same as the sum of its first n terms. Thus, the sum of first (m + n) terms of the AP is zero.