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Prove that : 1 P(1,1) + 2.P(2,2) +3.P(3,3)+...+ n.P (n,n)= P(n+1, n+1)-1. |
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Answer» Prove that : 1 P(1,1) + 2.P(2,2) +3.P(3,3)+...+ n.P (n,n)= P(n+1, n+1)-1. |
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