将课本例题进行有效的变通及拓展,既能让学生真正掌握所涉及内容又有利于其探究能力的培养,也是提高我们教师处理教材能力的有效途径.全日制普通高级中学教科书(实验修订本·必修)数学第二册(上)第130页图1例2:如图1,直线y=x-2与抛物线y2=2x相交于A、B两点,求证OA⊥OB.证明:设A The effective adaptation and expansion of textbook examples will not only enable students to truly grasp the content involved, but also help them develop their inquiry skills. It is also an effective way to improve the ability of our teachers to handle teaching materials. Full-time ordinary high school textbooks (experimental revisions) Compulsory) mathematics second volume (on) page 130 Figure 1 Example 2: In Figure 1, the line y = x-2 and the parabola y2 = 2x intersect at A, B two points, verify OA ⊥ OB. Proof: Set A