Math, asked by DasanPilla5225, 11 months ago

Prove the following
p(n,n) = 2p (n,n-2)
p(n,r) = p(n-1, r) + r , p(n-1, r-1)
p(n, n) = p(n, n-1)
p(n,r) = n.p(n-1,r-1)

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Answered by DevKumarAnand

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