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58问答库 > 几道初二数学题,急急急,写过程,对了还追加分.

几道初二数学题,急急急,写过程,对了还追加分.

2025-03-14 21:16:55

推荐回答（4个）

回答（1）：

1.化为（1-m）x>-1/2再与x<1/2比较可得1-m<0且为-1，m=2
2.x>=4-2a与x<（3+b）/2无交集可这样算不出来a的具体范围只能用b表示即a<=(5-b)/4

回答（2）：

原式化解的，x+3/2>（mx+2）/2,x+3>mx+2,(m-1)x<1,m-1=2.

回答（3）：

解：第四题由1m不小于-1\2

回答（4）：

1.化为（1-m）x>-1/2再与x<1/2比较可得1-m<0且为-1，m=2
2.x>=4-2a与x<（3+b）/2无交集可这样算不出来a的具体范围只能用b表示即a<=(5-b)/

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