我们先看人民教育出版社出版的教科书上的两道例题及其解答,其中题1是普通高中课程标准实验教科书(俗称新课标教材)《数学·选修2-1·B版》第48页例2(也即新课标教材《数学·选修1-1·B版》第40页例2),题2是全日制普通高级中学教科书(必修)(俗称大纲 We first look at the People’s Education Publishing House published two examples of textbooks and answers, of which the title 1 is the ordinary high school curriculum standard experimental textbook (commonly known as the new curriculum materials) “Mathematics · Elective 2-1 · B version” page 48 Example 2 (that is, the new curriculum textbook “Mathematics · Elective 1-1 · B version” on page 40 Case 2), Question 2 is a full-time ordinary high school textbook (compulsory) (commonly known as the outline