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圆x2+y2-4x=0在点P(1,)处的切线方程为A.x+y-2=0B.x+y-4=0C....
试题详情
圆x
2+y
2-4x=0在点P(1,
)处的切线方程为( )
A.x+
y-2=0
B.x+
y-4=0
C.x-
y+4=0
D.x-
y+2=0
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