1.函数奇偶性定义解读函数的奇偶性是函数在整个定义域上的性质,在函数定义域内的真子集上讨论函数的奇偶性是没有意义的.若对定义域内的任意一个x,都有f(x)=f(-x)或f(x)=-f(-x),则称f(x)为偶函数或奇函数.显然,函数定义域关于原点对称是函数具有奇偶 1. Definition of Function Parity The parity of the interpretation function is the property of the function over the entire domain. It is pointless to discuss the parity of the function on the true subset of the function domain. For any x in the domain, f (x) = f (-x) or f (x) = - f (-x), then f (x) is an even or odd function.Obviously, the function domain is symmetric with respect to the origin and the function has a parity