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贵刊所载冯老师《数学解题中的六大观察法》(《中学教学杂志》高中 ,2 0 0 2 .3 ) ,读来令人受益匪浅。但美中不足的是文中有一处失误 ,笔者认为有必要指出并给予修正。1 文中的失误文中例 3 :平面上有ｎ条直线 ,且任意两条不平行 ,任意三条不共点 ,则这ｎ条直线之间能分为多
The “Six Observations in Mathematical Problem Solving” (“Secondary Teaching Journal”, High School, 2000) was included in your magazine’s “Feng Teacher”. However, the only drawback is that there is a mistake in the text. I think it is necessary to point out and give corrections. 1 In the text of the article in Example 3: There are n straight lines in the plane, and any two are not parallel, any three are not common, then the n lines can be divided into many