Question

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

Answer 1

Please refer to the image for your answer.

Answer 2

sum of first m term of AP is same as the sum of its first n term

then : sum of first m term = sum of first n term

m = n

m + n = 0

Hence, proved

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