函数是高中数学的重要内容之一,其理论和应用涉及各个方面,函数的影子几乎时时处处闪现在每个问题之中,是贯穿整个高中数学的一条主线.函数综合问题是历年高考的热点,一般难度较大,考查内容和形式灵活多样.对函数综合题的深入研究和讨论,不仅是提高综合素质的有效途径,而且是备考的重要部署. Function is one of the important contents of high school mathematics. Its theory and application involve various aspects. The shadow of function is flashing everywhere in every problem. It is a main thread throughout the whole high school mathematics. Function synthesis is a hot topic in the college entrance examination. It is generally more difficult, and the content and form of examination are flexible and diverse. In-depth study and discussion of functional comprehensive questions is not only an effective way to improve the overall quality, but also an important preparation for preparation.