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In an arithmatic progression the sum …

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In an arithmatic progression the sum of first m terms is n and the sum of first n terms is m. Prove that the sum of its first (m+n) terms is -(m+n)

Posted by Sakshi Tiwari 4 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 4 years, 9 months ago

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).

2Thank You

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