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If `.^(n)C_(r-1): .^(n)C_(r): .^(n)C_(r+1)=3:4:5`, find the values of n and r.
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If `.^(n)C_(r-1): .^(n)C_(r): .^(n)C_(r+1)=3:4:5`, find the values of n and r.
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If `.^(n)C_(r-1): .^(n)C_(r): .^(n)C_(r+1)=3:4:5`, find the values of n and r.
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