The sum 1^3 1 + 1^3+2^3 1+3 + 1^3+2^3+3^3 1+3+5 + up to 8 terms, is:

JEE Main 2026 Mathematics question

The sum up to 8 terms, is:

Answer: (B)

The kth term is \dfrac{k(k+1)}{2}$/ =

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Question ID VK-015114