As follows:
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HKMO 05-06 (1-3)
2009-05-01 1:42 am
回答 (2)
2009-05-01 8:24 am
✔ 最佳答案
1 20+√300=x+y+√xy=>x=15 ,y=5x^2+y^2=250
2 2piR=4=>R=7/11
A=6(1/2)(7/11)^2sin60=147√3/242
3
5/28=1/(28/5)=1/(2+18/5)
Using the same method x=-6
The question is easy!
2009-05-01 5:51 pm
第一題應該係 x+y+2√xy
收錄日期: 2021-04-22 00:33:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090430000051KK01021