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同学们往往对不等式组中求待定系数的取值范围时,所得取值范围是否包含等号感到难以判断.从而产生错误,对此,我们通过三类实例,进行剖析.一、等号多余型例1若关于x的不等式组
Students often find it difficult to determine whether the range of values contained in the inequality group determines the range of the coefficient to be determined, resulting in an error, for which we analyze through three types of examples. Example 1 For an inequality group about x