直线方程测试
3
32,23
17
226.A14
A.1 B.2 C.3 D.4
l:x,y,3,0,l:4x,7y,1,09. 12
3α 5
A3x,4y,2,0,3x,4y,10,03x,4y,2,0 B C4x,3y,5,0,4x,3y,11,03x,4y,10,0 D
10.lxy0lxy20; l5xky150123
k
,, Ak,,Rk5k1 BkRk5k10 ,,,,
,,, CkRk1k0 DkRk5 ,,,,
100
号 1 2 3 4 5 6 7 8 9 10 答案
.
11. 2x+3yk=0xky+12=0yk 。
a12.l:x,ay,2a,2l:ax,y,a,1= 12
13.mxny1mn0
14. A,BA(,5,4)B(3,2),C(,1,2)
15ABCA(4,,1)B(2,,3)CABC (3,1)
2ax,a(a,1)y,(a,1),016. ax,2y,6,0
17.ABCA-15B-2-1C43MBC
1AB2AM3AB
18.l:x,y,4,0l:x,y,2,012
2x,y,1,012
19. 3x+4y-12=0, 7;
3x+3y-5=0, P(-1,0). 105
20C10xy,,,350
21.A-30l:x,2y,4,0 B151
2l |PA|+|PB|