If 1+2+….+k=55, then the value of k is - ProProfs
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If 1+2+….+k=55, then the value of k is

This question is part of Maths quiz for CBSE Class 10
Asked by Meyya on Sep 16, 2018

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meyya

Meyya

Answered on Sep 16, 2018

10

Sn = n(n+1)/2 55=k(k+1)/2. then k=10
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