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函数的值域是函数的三要素之一,求函数的值域是一个很重要的问题,也是一个复杂的问题,它与函数的最值密切相关,在各类试题中经常出现.下面的一些问题涉及到指数函数、对数函数、三角函数等基本初等函数,以及不等式、解析几何、导数的一些知识.同学们不须畏惧,题目不难,可认真阅读,初步了解一下其中的解决方法,以后学到这些知识时,回过头来想想会有更深的理解了.
The value range of a function is one of the three elements of the function. Finding the value range of a function is a very important problem, and it is also a complex problem. It is closely related to the most value of a function and often appears in various questions. The following The problem involves basic elementary functions such as exponential functions, logarithmic functions, trigonometric functions, and inequalities, analytical geometry, and derivatives. Students do not have to be afraid, the problem is not difficult, but they can be read carefully to get a preliminary understanding of the solution. When you learn this knowledge in the future, you will come back to think about a deeper understanding.