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x﹣2y+7=0 2x+y﹣1=0 x﹣2y﹣5=0 2x+y﹣5=0
3x-y-5=0 3x+y-7=0 x+3y-5=0 x-3y+1=0
x-3y+7=0 x-3y+13=0 2x-y+7=0 3x-y-5=0
x-2y-5=0 x-2y+7=0 2x+y-1=0 2x+y-5=0
x+2y-5=0 2x+y-4=0 x+3y-7=0 3x+y-5=0
3x-y-5=0 3x+y-7=0 3x-y-1=0 3x+y-5=0
2x+y-1=0 2x+y-5=0 x+2y-5=0 x-2y+7=0
(1,2)且与原点距离最大的直线方程为( ) A.x+2y-5=0 2x+y-4=0 x+3y-7=0 3x+y-5=0
x+2y-5=0 2x+y-4=0 x+3y-7=0 3x+y-5=0
(1,2)且垂直于直线2x+y﹣5=0的直线方程为( ) A.x﹣2y+4=0 2x+y﹣7=0 x﹣2y+3=0 x﹣2y+5=0
(2,3)且垂直于直线2x+y-5=0的直线方程为( ). A.x-2y+4=0 2x+y-7=0 x-2y+3=0 x-2y+5=0
x-3y+7=0 x-3y+13=0 2x-y+7=0 3x-y-5=0
2x+y-1=0 2x+y-5=0 x+2y-5=0 x-2y+7=0
x+2y﹣5=0 2x+y﹣4=0 x+3y﹣7=0 3x+y﹣5=0
x+2y-5=0 2x+y-4=0 x+3y-7=0 3x+y-5=0