函数奇偶性是函数的一项重要性质.高考中,常与函数其他性质结合出题.多角度、深层次、全面分析、研究函数奇偶性概念,形成合理的知识链条,有助于解决与此相关的函数综合题.一、定义及剖析设函数y=f(x),对任意x∈D,-x∈D,若有f(-x)=f(x),则称f(x)是偶函数,若有f(-x)=-f(x),则f(x Function parity is an important property of the function. In the college entrance examination, it is often combined with the other properties of the function. Multi-angle, in-depth, comprehensive analysis, study of the concept of function parity, the formation of a reasonable knowledge chain, help solve this problem Related function synthesis questions. First, definition and analysis Set function y = f (x), for any x ∈ D,-x ∈ D, if f (-x) = f (x), then call f (x) Even function, if f(-x)=-f(x), then f(x)