設(shè)f(x)的反函數(shù)是F(x),則F(x)的反函數(shù)是f(x),因?yàn)楹瘮?shù)的反函數(shù)就是以y=x的圖像為對(duì)稱軸,與原函數(shù)對(duì)稱的那個(gè)函數(shù)就是原函數(shù)的反函數(shù),那么反函數(shù)的對(duì)稱函數(shù)當(dāng)然是原函數(shù)了有反函數(shù)的條件是每一個(gè)y對(duì)應(yīng)一個(gè)x，兒x=y^2的反函數(shù)呢？這樣的x對(duì)Y可以多對(duì)一但不能一對(duì)多你這里是問函數(shù)的反函數(shù)有沒有反函數(shù)，你想啊只有原函數(shù)和反函數(shù)對(duì)稱啊你這里的混淆是怕反函數(shù)不成立