本练习主要是考查学生对分数指数幂和对数概念的掌握情况,考查学生对有理指数幂的运算性质和对数的运算性质的理解,着重考查学生对指数函数、对数函数的概念、图像和性质的理解、运用.考虑到二次函数的图像与性质、二次函数、二次方程与二次不等式的关系是本节的重点,二次函数的最大(小)值问题、一元二次方程实根的分布及二次函数的图 This exercise mainly examines students’ grasp of the concept of fractional exponentiation and logarithm, examines students’ understanding of the nature of rational exponentiation operations and the nature of logarithm operations, and focuses on students’ concepts and images of exponential functions and logarithmic functions. Understanding and application of properties and properties. Considering the relationship between quadratic function images and properties, quadratic functions, quadratic equations and quadratic inequalities is the focus of this section. The maximum (small) value problem of quadratic functions is The distribution of the real roots of the equation and the graph of the quadratic function