Question

函數(shù)y=f(x)(x∈R)有下列命題:
①在同一坐標(biāo)系中,y=f(x+1)與y=f(-x+1)的圖象關(guān)于直線x=1對(duì)稱;
②若f(2-x)=f(x),則函數(shù)y=f(x)的圖象關(guān)于直線x=1對(duì)稱;
③若f(x-1)=f(x+1),則函數(shù)y=f(x)是周期函數(shù),且2是一個(gè)周期;
④若f(2-x)=-f(x),則函數(shù)y=f(x)的圖象關(guān)于(1,0)對(duì)稱,其中正確命題的序號(hào)是　　　　.

Answer 1

②③④

解析