25.如圖,已知點(diǎn)D(-1,0),直線l
1的解析式為y=-x+6,經(jīng)過點(diǎn)C(2,n),與x軸交于點(diǎn)A,與y軸交于點(diǎn)B.
(1)如圖1,若直線l
2經(jīng)過點(diǎn)D,與直線l
1交于點(diǎn)C,求直線l
2的解析式;
(2)點(diǎn)M是x軸上一動點(diǎn),若△CDM為等腰三角形,求點(diǎn)M的坐標(biāo);
(3)如圖2,已知點(diǎn)E為直線l
1上一動點(diǎn),連接DE,將DE繞點(diǎn)D逆時針旋轉(zhuǎn)90°到DF,若CF=5,求此時點(diǎn)F坐標(biāo).