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课本中的题目重视基础,重视核心内容的训练,是高考和各种模拟考试命题的主要来源。同学们如果把课本题目研究透彻,有助于应对各种考试。例1(2015年湖北卷)将离心率为e_1的双曲线C_1的实半轴长a和虚半轴长b(a≠b)同时增加
Textbook topics value the foundation, focus on the core content of the training, is the main source of college entrance examination and a variety of simulated exams. Students who thoroughly study the textbook topics will help to cope with various exams. Example 1 (Hubei volume in 2015) simultaneously increases the real semi-axial length a and the imaginary semi-axial length b (a ≠ b) of the hyperbola C_1 with eccentricity e_1