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證明無論m何數代數式m的平方-m的值總大於代數式m-2的值 m²;-m-(m-2) =m²;-2m+2 =(m-1)²;+1; ∵(m-1)²;≥0; ∴(m-1)²;+1≥1>0恒成立; ∴無論m何數代數式m的平方-m的值總大於代數式m-2的值
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