题目内容
若P(2,-1)为圆(x-1)2+y2=25的弦AB的中点,则直线AB的方程是________.
x-y-3=0
若P(2,-1)为圆(x-1)2+y2=25的弦AB的中点,则直线AB的方程是
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A.x-y-3=0
B.2x+y-3=0
C.x+y-1=0
D.2x-y-5=0
若P(2,-1)为圆(x-1)2+y2=25中弦AB的中点,则AB所在直线的方程是
2x+y-3=0
x+y-1=0
2x-y-5=0
若P(2,-1)为圆(x-1)2+y2=25的弦AB的中点,则直线AB的方程是( )
A.x-y-3=0 B.2x+y-3=0
C.x+y-1=0 D.2x-y-5=0