ab除以mc小于0,ac大于0,lbl=b,求m范围
人气:149 ℃ 时间:2020-08-25 18:29:05
解答
b>0
a/mc详细点好不???,谢谢!ab/mc<0a,b,m,c都不为0b=|b|>0a/mc<0(ac)/(mcc)<0ac>0 cc>0m<0
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