http://www.fopix.net/d/815607-1/maths.JPG
what is the answer?
請解釋一下點解, thanks
maths(F.4) urgent
2007-09-10 6:18 am
回答 (1)
2007-09-10 6:52 am
✔ 最佳答案
Let the answer be A.Observe that
A^2 = 2+A
A^2 - A - 2 = 0
(A-2)(A+1) = 0
A= 2 or -1(rejected, since square root of a number must be >0)
Hence the answer is 2
參考: me
收錄日期: 2021-04-13 18:11:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070909000051KK05340