Published by:
CGP EDU Academic Team
Published on: August 14, 2026
For k 
N, if the sum of the series 
is 10, then the value of k is
Text Solution
Verified by ExpertsThe correct answer is:
2
(2)
Given,
.....
.….
On subtracting above two equations we get,
.....
…
Again subtracting both equations we get,
10(k - 1) 3 = k(k 2 + k-1)
9k 3 – 31k 2 + 31k - 10 = 0
k = 2
Hence, k = 2
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