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(x+1)2+y2=2 (x-1)2+y2=2 (x+1)2+y2=4 (x-1)2+y2=4
(x+1)2+y2=2 (x+1)2+y2=8 (x-1)2+y2=2 (x-1)2+y2=8
为圆(x-1)2+y2=1上的动点,PA是圆的切线,且|PA|=1,则P.点的轨迹方程是( ) A.(x-1)2+y2=4 (x-1)2+y2=2 y2=2x y2=-2x
(x-1)2+(y-4)2=1 (x-1)2+(y+4)2=1 (x-1)2+(y-4)2=16 (x-1)2+(y+4)2=16
y=2(x-1)2+3 y=2(x+1)2+3 y=-2(x-1)2+3 y=-2(x+1)2+3
(x-1)2+y2=1 (x-1)2+y2=4 (x-1)2+y2=2 (x-1)2+y2=.
y=(x+1)2+4 y=(x-1)2+4 y=(x+1)2+2 y=(x-1)2+2。
k∈R且k≠±5且k≠1 k∈R且k≠±5且k≠﹣10 k∈R且k≠±1且k≠0 k∈R且k≠±5
(x+1)2+(y-1)2=2 (x+1)2+(y+1)2=2 (x-1)2+(y-1)2=2 (x-1)2+(y+1)2=2
为圆(x-1)2+y2=1上的动点,PA是圆的切线,且|PA|=1,则P.点的轨迹方程为( ) A.y2=2x (x-1)2+y2=4 y2=-2x (x-1)2+y2=2
, 两点.若|AF|=3|BF|,则L.的方程为 (A) y=x-1或y=-x+1 (B.)y=(X-1)或y=-(x-1) ( )y=(x-1)或y=-(x-1) ( )y=(x-1)或y=-(x-1)