“奇”是个多音字 .当年学习函数的奇偶性时 ,若不是偶函数在旁“作证”对比 ,险些将“奇”念错 ,以为奇函数是一种神奇或奇特的函数 ,自此我与奇函数结下不解之缘 ,最终成了一名常与奇函数打交道的数学教师 .其实奇函数并不奇特 ,很多函数都具有奇偶性 ,奇函数也不神奇 ,因为 “Odd” is a polyphonic word. When we study the parity of functions, if we don’t compare “evenness” with even function, we will almost always read “odd” and think that odd function is a magical or peculiar function. The odd relationship of odd functions eventually becomes a mathematics teacher who often deals with odd functions. In fact, odd functions are not unique, many functions have parity, and odd functions are not magical because