F4 A-MATHS.(2)
回答 (1)
2007-05-24 6:30 am
✔ 最佳答案
直線族: 2x-y-8+k(4x+y-3)=0(4k+2)x+(k-1)y-3k-8=0
兩軸截距相等
代x=0,
y= 3k+8
k-1
代y=0,
x= 3k+8
4k+2
3k+8 = 3k+8
k-1 4k+2
k=-1,-8/3
代k入方程: (4k+2)x+(k-1)y-3k-8=0
收錄日期: 2021-04-13 00:31:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070523000051KK04216