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二次函数不仅是初中数学的核心知识,更是初中数学思想——函数思想、数形结合思想、分类思想和转化思想的载体.二次函数是初中数学的重点之一,也是难点之一,在初中毕业生学业考试中占有举足轻重的地位,也是当下压轴题中最常见的问题之一,而其中关于抛物线的内接三角形的面积最值问题倍受命题者青睐.笔者有幸参加了宁波市2011年初中毕业生学业考试第26题的阅卷工作,在阅卷中发现了一个特殊的“错误”答案,
The quadratic function is not only the core knowledge of junior high school mathematics, but also the function of junior high school mathematics thought-function idea, the idea of combination of number and shape, classification thought and transformation thought. The quadratic function is one of the key points of junior mathematics, and it is also one of the difficulties. In junior high school graduates’ academic examinations, it occupies a decisive position, and is one of the most common problems in the current finale issue. Among them, the question of the area value of the intrinsic triangle of the parabola is favored by the proposition. The author has the honor to participate in Ningbo 2011. In the examination work of the 26th issue of the Junior High School Graduates Academic Examination, a special “error” answer was found in the examination paper.