A.5x+12y+20=0 | B.5x-12y+20=0或x+4=0 |
C.5x-12y+20=0 | D.5x+12y+20=0或x+4=0 |
|-k-2+4k| | ||
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|3k-2| | ||
|
AB |
2 |
|3k-2| | ||
|
5 |
12 |
5 |
12 |
A.-
| B.-2 | C.2 | D.
|
A.x-2y-1=0 | B.x-2y+1=0 | C.2x+y-2=0 | D.x+2y-1=0 |
A.经过点P0(x0,y0)的直线都可以用方程y-y0=k(x-x0)表示 | ||||
B.经过定点A(0,b)的直线都可以用方程y=kx+b表示 | ||||
C.经过任意两个不同点P1(x1,y1),P2(x2,y2)的直线都可用方程(x2-x1)(y-y1)=(y2-y1)(x-x1)表示 | ||||
D.不经过原点的直线都可以用方程
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9
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10 |
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