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Why 2n+1 for A1+A2+........ +A2n in this question of AP?

Anshu Mishra , 6 Years ago
Grade 12th pass
anser 1 Answers
Aditya Gupta

Last Activity: 6 Years ago

it is GIVEN in the question that “their sum exceeds their number by one”.
so lets say there are k means inserted. then the sum is k+1.
in this case k is given to be even so that k=2n
and hence sum is taken to be 2n+1
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