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Let Sₙ = Σ (k+1)/2 * k². Then Sₙ can take value(s)

1. 1056
2. 1088
3. 1120
4. 1332

Correct answer: 1056

Solution

The summation Sₙ involves terms proportional to k² and k³. Simplifying the series and substituting values, Sₙ is found to equal 1056 for the given conditions.

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