Published by:
CGP EDU Academic Team
Published on: August 11, 2026
If 
then n =
Text Solution
Verified by ExpertsThe correct answer is:
A
⇒ 
⇒ 
⇒ 
(1 3 + 2 3 + 3 3 + ......... + n 3 ) = 4/5
⇒ 
⇒ 5n 2 – 16n – 16 = 0 ⇒ n = 4
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