CBSE Class 10 Answered
If the sum of first m terms of an A.P. is n and the sum of first n terms is m, then show that the sum of its first (m + n) terms is
- (m + n).
Asked by Topperlearning User | 22 Sep, 2017, 08:40: AM
Expert Answer
Given, sum of first m terms of an A.P. is n.
Also, sum of first n terms is m.
Subtracting (2) from (1),
Hence, the sum of its first (m + n) terms is -(m + n).
Answered by | 22 Sep, 2017, 10:40: AM
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