x,y,z are 3 real number such that x+y+z=5 and xy+yz+zx=3.Find the maximum of
x.
Higher level maths
2013-11-21 6:38 am
回答 (4)
2013-11-22 7:27 pm
✔ 最佳答案
﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣圖片參考：http://imgcld.yimg.com/8/n/HA05107138/o/20131122112648.jpg
2013-11-21 9:02 am
Dear ALL,
Do you know what's wrong with this solution?
http://i.imgur.com/LIRKYmn.png
^__^"
2013-11-22 22:34:19 補充：
哈哈! Bravo~
這樣就準確無誤啦~
☆ヾ(◕‿◕)ノ
Do you know what's wrong with this solution?
http://i.imgur.com/LIRKYmn.png
^__^"
2013-11-22 22:34:19 補充：
哈哈! Bravo~
這樣就準確無誤啦~
☆ヾ(◕‿◕)ノ
2013-11-21 7:29 am
If x = √19, y=0 and z=0
It does not satisfy with the two given equations x+y+z=5 and xy+yz+zx=3
It does not satisfy with the two given equations x+y+z=5 and xy+yz+zx=3
2013-11-21 7:20 am
Answer. maximum of x= 13/3
2013-11-20 23:30:51 補充：
when x=3/13, y=1/3, z=1/3
2013-11-20 23:31:27 補充：
when x=13/3, y=1/3, z=1/3.
2013-11-20 23:30:51 補充：
when x=3/13, y=1/3, z=1/3
2013-11-20 23:31:27 補充：
when x=13/3, y=1/3, z=1/3.
收錄日期: 2021-04-13 19:49:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20131120000051KK00268