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数学
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已知m=a^2-4a+3,n=-2a+1比较大小
人气:467 ℃ 时间:2020-02-05 03:23:58
解答
∵m-n
=a²-4a+3-(-2a+1)
=a²-4a+3+2a-1
=a²-2a+2
=(a²-2a+1)+1
=(a-1)²+1≥1>0
∴m>n.
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