A.4x-3y-6=0 |
B.4x-3y-66=0 |
C.4x-3y-6=0或4x-3y-66=0 |
D.4x-3y-15=0 |
|4×9-3×0+b| |
5 |
A.-7 | B.-1或-7 | C.-6 | D.-
|
A.x-3y+7=0 | B.x-3y+13=0 | C.2x-y+7=0 | D.3x-y-5=0 |
A.若两条直线平行,则这两条直线的斜率相等 |
B.若两条直线的斜率不相等,则这两条直线可以平行 |
C.若两条直线垂直,则这两条直线的斜率之积等于-1 |
D.若两直线的斜率的积等于-1,则这两条直线垂直 |
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