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白新岭 发表于 2020-11-5 09:51 用方程的解组数证明:\(C_i^i+C_{i+1}^i+C_{i+2}^i+......+C_N^i=C_{N+1}^(i+1}\) \(C_i^i\)+\(C_{i+1}^i\ ...
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