回答以下問題，加上清楚的列式!!!
1.In the figure, if the distance between A( 1-2k,3 ) and B( 3k,3 ) is 4 units,
find the value of k.
Maths!!!
2008-06-16 4:49 pm
回答 (2)
2008-06-16 5:15 pm
✔ 最佳答案
(1-2k)-(3k)= 4 or-4 1 - 5k = 4 or -4
- 3 = 5k or 5 = 5k
k = - 3 / 5 or 1
參考: byfrgnhvt
2008-06-16 10:19 pm
∵AB=4
∴√[( 1-2k)- 3k]2+[(3-3)2]=4
√(1-5k)2=4
1-5k=4
5k=-3
k=-3/5
∴√[( 1-2k)- 3k]2+[(3-3)2]=4
√(1-5k)2=4
1-5k=4
5k=-3
k=-3/5
收錄日期: 2021-04-23 20:37:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080616000051KK00400