對于平面直角坐標(biāo)系xOy中的點(diǎn)P和圖形W,給出如下定義:圖形W關(guān)于經(jīng)過點(diǎn)(m,0)且垂直于x軸的直線的對稱圖形為W',若點(diǎn)P恰好在圖形W'上,則稱點(diǎn)P是圖形W關(guān)于點(diǎn)(m,0)的“關(guān)聯(lián)點(diǎn)”.
(1)若點(diǎn)P是點(diǎn)Q(3,2)關(guān)于原點(diǎn)的“關(guān)聯(lián)點(diǎn)”,則點(diǎn)P的坐標(biāo)為
(-3,2)
(-3,2)
;
(2)如圖,在△ABC中,A(1,1),B(6,0),C(4,-2).
①點(diǎn)C關(guān)于x軸的對稱點(diǎn)為C',將線段BC'沿x軸向左平移d(d>0)個(gè)單位長度得到線段EF(E,F(xiàn)分別是點(diǎn)B,C'的對應(yīng)點(diǎn)),若線段EF上存在兩個(gè)△ABC關(guān)于點(diǎn)(1,0)的“關(guān)聯(lián)點(diǎn)”,則d的取值范圍是
4<d≤6.
4<d≤6.
.
②已知點(diǎn)M(m+1,0)和點(diǎn)N(m+3,0),若線段MN上存在△ABC關(guān)于點(diǎn)(m,0)的“關(guān)聯(lián)點(diǎn)”,求m的取值范圍.