1教材内容分析高中阶段函数的学习主要是初等函数中指数函数、对数函数和幂函数,其中幂函数最为灵活,其定义域和值域的限定条件更多。高中数学注重从不同的角度学习函数的概念知识,其中最为广泛运用的便是函数的图像。图像可以将幂函数直观地展现出来,从而了解它们的变化情况,学习幂函数的定义和性质。幂函数的基本模型是y=x~a,底数是自变量,指数是常数,其中x是自变量,a是常数。高中幂函数与指数函数之间定义存在相似,概念的理解是学习的难 A textbook content analysis The study of high school function is mainly the exponential function, logarithmic function and power function of the elementary function, among which the power function is the most flexible, and its definition domain and range of values ​​are more limited. High school mathematics focuses on learning concept functions from different perspectives, the most widely used of which is the image of a function. Images can visualize power functions intuitively to understand their changes and to learn the definition and nature of power functions. The basic model of the power function is y = x ~ a, the base is an independent variable, the exponent is constant, where x is an independent variable, a is a constant. The definitions of power function and exponential function in high school are similar, and the understanding of concept is difficult to learn