1.
(2020九上·余姚月考)
已知關(guān)于x的函數(shù)y=(x-1) [(k-1)x+ (k-2)](k是常數(shù)),設(shè)k分別取0,1,2時(shí),所對(duì)應(yīng)的函數(shù)為 y0 , y1 , y2 , 某學(xué)習(xí)小組通過(guò)畫(huà)圖,探索,得到以下結(jié)論:①函數(shù)y0 , y1 , y2的圖象都經(jīng)過(guò)點(diǎn)(1,0):②滿足y1>y2的x取值范圍是– 1<x<1;③不論k取何實(shí)數(shù),y=(x-1) [(k-1) x+ (k-2)]的圖象都經(jīng)過(guò)點(diǎn)(1,0)和點(diǎn)( –1,2);則以上結(jié)論正確的是( )
A . ①
B . ②③
C . ①②
D . ①②③