1 |
8 |
1 |
|5a+3| |
1 |
|4a+2| |
1 |
2 |
1 |
(5a+3)(4a+2) |
1 |
8 |
1 |
10 |
1 |
10 |
x2 |
4 |
y2 |
16 |
A.x+2y+4=0 | B.x+2y-4=0 | C.2x+y+4=0 | D.2x+y-4=0 |
A.过点P(x0,y0)的直线都可表示为y-y0=k(x-x0) | ||||
B.过两点(x1,y1),(x2,y2)的直线都可表示为(x-x1)(y2-y1)=(y-y1)(x2-x1) | ||||
C.过点(0,b)的所有直线都可表示为y=kx+b | ||||
D.不过原点的所有直线都可表示为
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