x^2 + (1/x^2)=u^2-2
Solve 2( X^2 + 1/(X^2) ) - 5( x+ 1/(x^2) ) +4 = 0
f.4,,amathz
2008-09-28 12:35 am
回答 (1)
2008-09-29 9:27 am
收錄日期: 2021-04-13 16:06:44
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080927000051KK01596