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《高中数学新课程标准》的基本理念指出在数学教学的过程中,要积极倡导学生自主学习,培养学生在数学学习的过程勇于探索的学习方式,函数在高中阶段是非常重要的,函数具有三要素:定义域、值域、对应法则,其中起决定性作用的是定义域和值域,定义域和对应法则共同确定了值域.所以值域是一个很重要的部分,往往学生更注重函数定义与定义域的理解,对于值域的掌握就不会太重视,但是在高考中,求解函数的值域也占有一定的比例,接下来研究研究函数的值域及求解方法.
The basic idea of the New High School Mathematics Curriculum Standards points out that in the process of mathematics teaching, students should actively advocate self-study and train students in the learning process of mathematics. The function is very important in the high school stage. The function has three. Elements: domain, value domain, and correspondence rule. The decisive ones are the definition domain and the value domain. The definition domain and the corresponding rule jointly determine the value domain. So the value domain is a very important part, and students often pay more attention to the function definition. With the definition of domain understanding, the value domain will not be too much attention, but in the college entrance examination, the domain of the solution function also occupies a certain proportion, the next study of the function of the domain and the solution method.