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(x+1)2+y2=2 (x+1)2+y2=8 (x-1)2+y2=2 (x-1)2+y2=8
(1,2), (3,6), (5,2),M.为AB中点,N.为AC中点,则中位线MN所在直线方程为( ) A.2x+y-8=0B.2x-y+8=0 C.2x+y-12=0 2x-y-12=0
3x+4y-36=0 3x-2y-18=0 2x-2y-24=0 2x-4y-36=0
2x+3y+4=0 2x+3y-8=0 3x-2y-7=0 3x-2y-1=0
2x+3y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
2x+y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
x-2y=0 x+2y-4=0 2x+3y+4=0 x+2y-8=0
3x+2y-1=0 3x+2y+7=0 2x-3y+5=0 2x-3y+8=0
2x﹣y﹣3=0 2x﹣y+3=0 2x+y+3=0 2x+y﹣3=0
2x+3y﹣8=0 3x﹣2y+1=0 x+2y﹣5=0 3x+2y﹣7=0
x-2y=0 x+2y-4=0 2x+3y+4=0 x+2y-8=0
2x-y-1=0 2x+y+1=0 2x-y+1=0 2x+y-1=0
2x+8y+z+8=0 2x-8y+z+8=0 2x+8y-z+8=0 2x+8y+z-8=0
(-2,2), (4,-2)等距离,则直线l的方程为( ) A.2x+3y-18=0 B.2x-y-2=0 3x-2y+18=0或x+2y+2=0 2x+3y-18=0或2x-y-2=0
x+2y+8=0 x+2y-8=0 x-2y-8=0 x-2y+8=0