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Prove that for 3 le" r " le n, ""^((n-3))C_(r)+.""^((n-3))C_((r-1))+3. ""^((n-3))C_((r-2))+""^((n-3))C_((r-3))=""^(n)C_(r).

Answer»


ANSWER :`THEREFORE LHS = RHS`


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