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已知|2m-4|+根号3n+3=0,求7m-11n+mn
人气:220 ℃ 时间:2020-04-05 05:14:19
解答
|2m-4|+根号3n+3=0,
则2m-4=0,3n+3=0
则m=2,n=-1
7m-11n+mn
=14+11-2
=23
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