问题:
已知直线l 1:(k-3)x+(5-k)y+1=0与l 2:2(k-3)x-2y+3=0垂直,则K的值是( )
A.1或3
B.1或5
C.1或4
D.1或2
已知直线l 1:(k-3)x+(5-k)y+1=0与l 2:2(k-3)x-2y+3=0垂直,则K的值是( )
A.1或3 | B.1或5 | C.1或4 | D.1或2 |
参考答案: