1　本单元重、难点分析本单元学习的重点是分数指数幂与对数的概念和运算性质 ,指数式与对数式的等价转化 ,指数函数与对数函数的定义、图象和性质 ;难点是根式与对数的计算 ,函数知识的应用 .在学习本单元基础知识的同时 ,要进一步重点学习与运用数形结合、分类讨论、等价转化 1 The unit’s emphasis and difficulty analysis The key points of this unit are the concept and operational nature of fractional exponentiation power and logarithm, the equivalent transformation of exponential and logarithmic expressions, the definition, image and nature of exponential function and logarithmic function; It is the calculation of roots and logarithms and the application of function knowledge. While studying the basic knowledge of this module, it is necessary to further study and apply the combination of number and shape, classification and discussion, and equivalent transformation.