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抽象函数问题是高考考查热点之一.由于函数表现形式的抽象性,使得这类问题成为函数内容的一个难点.本文结合最近几年高考考查的内容,对该问题进行分类解析.一、定义域问题例1(1)已知函数f(2x+1)的定义域是[1,2],求f(x)的定义域;(2)已知函数f(x)的定义域为[3,5],求函数f(2x+1)的定义域.
The abstract function problem is one of the hottest points in college entrance examination.Due to the abstraction of the function representation form, this kind of problem becomes a difficult part of the function content.This article classifies and analyzes the question according to the contents of the entrance examination in recent years. Problem 1 (1) It is known that the domain of function f (2x + 1) is [1,2] and the domain of f (x) is found. (2) The domain of the known function f , 5], find the function f (2x + 1) domain.