Solve the following equation:
2(x^+(1/x^))+7(x-(1/x))-1=0
show all steps pls~
Quadratic Equation in one unknown (S4 math problem)
2006-11-09 6:29 am
回答 (2)
2006-11-10 7:02 am
✔ 最佳答案
題目是否應為:2(x^2+(1/x^2))+7(x-(1/x))-1=0
若是,
let y=x-1/x
then y^2=x^2-2+1/x^2
LHS=2(y^2+2)+7y-1=0
2y^2+7y+3=0
The remaining steps are straightforward.
參考: 自己
2006-11-09 7:00 am
2(x^+(1/x^))+7(x-(1/x))-1=0
question有問題=.=
question有問題=.=
收錄日期: 2021-04-12 21:21:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061108000051KK04854