我們知道,函數(shù)y=f(x)的圖象關(guān)于坐標(biāo)原點(diǎn)成中心對(duì)稱圖形的充要條件是函數(shù)y=f(x)為奇函數(shù),有同學(xué)發(fā)現(xiàn)可以將其推廣為:函數(shù)y=f(x)的圖象關(guān)于點(diǎn)P(m,n)成中心對(duì)稱圖形的充要條件是函數(shù)y=f(x+m)-n為奇函數(shù).若函數(shù)f(x)的圖象關(guān)于點(diǎn)(1,1)對(duì)稱,且當(dāng)x∈[0,1]時(shí),f(x)=x
2-2ax+2a.
(1)求f(0)+f(2)的值;
(2)設(shè)函數(shù)
.
①證明函數(shù)g(x)的圖象關(guān)于點(diǎn)(2,-1)對(duì)稱;
②若對(duì)任意x
1∈(0,2),總存在x
2∈(0,2),使得f(x
1)=g(x
2)成立,求a的取值范圍.