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车树高老师在《中学生数学》(2011年1月下)所刊发表的《一元一次不等式组中的参数》一文,出现了三处错误:①例3中不等式组无解时a≤-1而不是a<-1;②例4中的C、D选项一样;③例4答案应为-5
There was three mistakes made by Prof. Takashi Shiki in his article “Parameters in Uniform Inequality Group” published by “High School Mathematics” (under January 2011): ① In the inequality group in Example 3, a ≤ -1 Rather than a <-1; ② Example 4 C, D options; ③ Example 4 The answer should be -5