IF X^1/2+X^ -1/2=3
姐係X既1分2次+X既負1分2次,,加埋等於3
X^2+1/X^2
姐係X既2次加,,,1分之X^2次
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MATHS,,,10MS,,,HELP
2007-10-06 8:07 am
回答 (2)
2007-10-06 5:30 pm
✔ 最佳答案
As follows~~~圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/index20.jpg?t=1191634232
參考: Myself~~~
2007-10-06 8:13 am
[開方(x) + 1/開方(x)]^2 = 9
x + 2 + 1/x = 9
x + 1/x = 7
(x + 1/x)^2 = 7^2
x^2 + 2 + 1/x^2 = 49
x^2 + 1/x^2 = 47
x + 2 + 1/x = 9
x + 1/x = 7
(x + 1/x)^2 = 7^2
x^2 + 2 + 1/x^2 = 49
x^2 + 1/x^2 = 47
參考: my math knowledge
收錄日期: 2021-04-13 13:46:42
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