Calcul the sum is a very interesting subject, so I present to you this one. Can you solve it ?:D

Prove that: \(\forall{n}\in{N}\), \(\displaystyle \sum_{i+j=n}C^i_n(i+1)^{i-1}(j+1)^{j-1}=2(n+2)^{n-1}\).

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TopNewestgo with pmi i.e principal of mathematical induction

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Can you write it down more clearly? Thanks!

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