Recall that S(n, k) is the Stirling number of the second kind with parameters n and k. Prove the following: (s(n,n– 1) = C(n, 2) . Vn E Z+

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Please help me with this question. I am stuck. This is a discrete mathematic question. PLEASE PLEASE HELP ME.

Recall that \( S(n, k) \) is the Stirling number of the second kind with parameters \( n \) and \( k \).

Prove the following:

\[
\forall n \in \mathbb{Z}^+ \left( S(n, n-1) = C(n, 2) \right).
\]
Transcribed Image Text:Recall that \( S(n, k) \) is the Stirling number of the second kind with parameters \( n \) and \( k \). Prove the following: \[ \forall n \in \mathbb{Z}^+ \left( S(n, n-1) = C(n, 2) \right). \]
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