若函數(shù)f(x)的圖象經(jīng)過(0,-1),則函數(shù)y=f(x+4)的反函數(shù)的圖象經(jīng)過點的坐標是______.
【答案】分析:根據(jù)原函數(shù)與反函數(shù)圖象之間的關(guān)系可得結(jié)論,對于原函數(shù)與復(fù)合函數(shù)的所過定點問題,本題可利用在函數(shù)值-1保持不變的情況下,求出與原函數(shù)自變量x=0與之對應(yīng)的復(fù)合函數(shù)的自變量x=-4,由函數(shù)與反函數(shù)定義域和值域的關(guān)系得出反函數(shù)圖象經(jīng)過點(-1,-4).
解答:解:由函數(shù)y=f(x)的圖象經(jīng)過點(0,-1),
所以當(dāng)x=-4時有f(4+x)=f(0)=-1,
從而函數(shù)y=f(4+x)過點(-4,-1),則函數(shù)y=f(4+x)的反函數(shù)并經(jīng)過點(-1,-4),
故答案為:(-1,-4).
點評:本題主要考查復(fù)合函數(shù)與原函數(shù)關(guān)系,以及函數(shù)與反函數(shù)關(guān)系,屬于基礎(chǔ)題.