一、导言课堂点拨是门艺术。既充分调动了学生求知的积极性,又使学生尝到了思考的乐趣,享受到创造的快乐。巧妙机智的点拨,不但能给学生指明思考问题的方向,而且能让学生在解决问题的过程中,迸发出发散思维的火花,让学生养成“一题多解”的习惯。二、背景函数是高中数学的灵魂,学好了函数,高中数学的学习就轻松了一大半,而几乎所有的数学思想方法都与函数有关,所以对于高中生来讲,学好函数至关重要。幂函数是继指数函数、对数函数之后的一节内容,是高中阶段所学习的基本初等函数之一。学习函数往往从图像着手,进而分析其性质。指数函数,对数函数的图像易于把握,只有两种情况(a>1和0 First, the introduction of classroom instruction is the door art. Not only fully mobilize the enthusiasm of students seeking knowledge, but also enable students to taste the fun of thinking, to enjoy the joy of creation. Clever and clever advice, not only to students in the direction of thinking problems, but also allow students to solve the problem in the process of the burst of thinking sparks burst, so that students develop “more than one solution” habit. Second, the background function is the soul of high school mathematics, learn the function, high school mathematics learning easier than most, and almost all of the mathematical thinking methods are related to the function, so for high school students, learn the function is essential. Power function is an exponential function, the logarithm function after a section is one of the basic elementary functions learned in high school. Learning function often start from the image, and then analyze its nature. Exponential functions, logarithmic function images are easy to grasp, there are only two cases (a> 1 and 0)