The line segment joining points A (0,6) and B (4,2) is produced to cut the a-axia at point C.
Find AB : BC
我唔知有無計錯：-3比1
可以負數！？
F.3 maths
2011-05-11 5:35 am
回答 (3)
2011-05-14 10:35 pm
✔ 最佳答案
cut the a-axia?打錯!2011-05-14 14:35:18 補充：
圖片參考：http://i.imgur.com/ogkUs.gif
http://i.imgur.com/ogkUs.gif
2011-05-12 9:25 am
The line segment joining points A (0,6) and B (4,2) is produced to cut the a-axia at point C.Find AB : BC
首先第一步搵AB ge equation
(y-6)/(x-0)=(2-6)/(4-0)
(y-6)/x=-1
x+y-6=0
之後sub C(a,0)入equation x+y-6=0
可以搵到 a=6
再計AB同BC ge長度
AB=√(6-2)^2 + (0-4)^2
AB= √32
BC=√(4-6)^2 + (2-0)^2
BC=√8
AB:BC=√32:√8
=2√8:√8
=2:1
首先第一步搵AB ge equation
(y-6)/(x-0)=(2-6)/(4-0)
(y-6)/x=-1
x+y-6=0
之後sub C(a,0)入equation x+y-6=0
可以搵到 a=6
再計AB同BC ge長度
AB=√(6-2)^2 + (0-4)^2
AB= √32
BC=√(4-6)^2 + (2-0)^2
BC=√8
AB:BC=√32:√8
=2√8:√8
=2:1
2011-05-11 7:05 am
a-axia ???
收錄日期: 2021-04-13 17:58:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110510000051KK01406