Question:medium

If \(\sum_{k=1}^{n} k(k+1)(k-1) = p n^4 + q n^3 + t n^2 + s n\), where \(p, q, t, s\) are constants, then the value of \(s\) is equal to

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Rewrite products into powers before summation.
Updated On: Mar 23, 2026
  • \(-\dfrac14\)
  • \(-\dfrac12\)
  • \(\dfrac12\)
  • \( s = -\frac{1}{4} \)
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The Correct Option is A

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