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与一元一次不等式组有关的问题中,经常会出现已知解的情况,来确定有关字母的取值范围的问题·部分同学遇到此类问题时,往往感到无从下手或频频出错·现分析如下:例1若不等式组x-m-30x-2m+10无解那么m的取值范围是()(A)m4(B)m≤4(C)m4(D)m≥4分析:原不等式组变形为xm+3x2m
In the problems related to the one inequalities inequality group, there are often cases of known solutions to determine the question of the range of letter values. When some students encounter such problems, they often feel that they cannot start or frequently make mistakes. The following analysis is as follows: : Example 1 If the inequality group xm-30x-2m+10 has no solution then the range of m is () (A) m4 (B) m ≤ 4 (C) m4 (D) m ≥ 4 Analysis: The original inequality group deformation Xm+3x2m