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课本是学生获得知识的根源,“万变不离其踪”指的就是课本,课本的例题更是知识的精华,往往也是高考试题的源泉.在学习中,我们若对例题的内涵和外延进行挖掘,并适当将其推广、变形、转化、延伸即可充分提高同学们的学习兴趣,培养思维能力和创新能力.下面以一道课本例题为例进行阐述.例题(高中数学新人教B版必修四第97页,例2)已知A、B是直线l上的任意两点,O是l外一点,求证:对直线l上任意一点P,存在实数t,使
Textbook is the root cause of the students to obtain knowledge, “change unwavering ” refers to the textbook, textbook example is the essence of knowledge, is often the source of college entrance examination questions in the study, if we connotation and extension Excavation, and its appropriate promotion, deformation, transformation, extension can fully enhance the students’ interest in learning, training thinking ability and ability to innovate.The following textbook example as an example to illustrate .Example (high school mathematics taught B edition compulsory Fourth page 97, Example 2) known A, B is any two points on the straight line l, O is a point outside l, verify: for any point P on the straight line l, there is a real number t