过点P(-1,0)作圆C:(x- 1)2 + (y- 2)2 = 1的两切线,设两切点为A、B,圆心为C,则过A、B、C的圆方程是
A.x2 + (y - 1)2 =" 2" | B.x2 + (y - 1)2 =" 1" |
C.(x- 1)2 + y2 =" 4" | D.(x- 1)2 + y2 = 1 |
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过点P(-1,0)作圆C:(x- 1)2 + (y- 2)2 = 1的两切线,设两切点为A、B,圆心为C,则过A、B、C的圆方程是
A.x2 + (y - 1)2 =" 2" | B.x2 + (y - 1)2 =" 1" |
C.(x- 1)2 + y2 =" 4" | D.(x- 1)2 + y2 = 1 |