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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
(x+1)2+y2=1 x2+y2=1 x2+(y+1)2=1 x2+(y-1)2=1
, 两点,且这两点平分圆N.的圆周,则圆M.的圆心坐标为( ). A.(1,-2)B.(-1,2) (-1,-2) (1,2)
(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
(x-2)2+(y-1)2=4 (x-2)2+(y-1)2=20 (x-2)2+(y-1)2=12 (x-2)2+(y-1)2=4或(x-2)2+(y-1)2=20
(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
(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