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点P(2,-1)为圆(x-1)2+y2=25内弦AB的中点,则直线AB的方程为
x-y-3=0
2x+y-3=0
x+y-1=0
2x―y―5=0
点P(2,-1)为圆 (x-1) 2+y2=25内弦AB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