鄭鳳淵

摘 要：函數(shù)y=f（x）與函數(shù)y=g（x）圖象之間的交點問題，即函數(shù)h（x）=f（x）-g（x）與x軸交點的問題，也就是函數(shù)h（x）=0的零點問題在近年高考試題中頻繁出現(xiàn)。本文介紹一種依據(jù)方程與函數(shù)的思想、數(shù)形結(jié)合的思想，將已知含有參數(shù)的函數(shù)f（x）的零點個數(shù)問題轉(zhuǎn)化為另兩個函數(shù)的圖象交點個數(shù)問題這種通用解答含有參數(shù)的函數(shù)零點個數(shù)的方法。

關(guān)鍵詞：函數(shù)零點；參數(shù)函數(shù)；零點個數(shù)；通解法