Given f(x) 2 / √x
find the derivative of f(x) by first principle
個step點計,answer 係咩?
Derivative問題...急!!!
2007-04-21 8:37 am
回答 (2)
2007-04-21 9:02 am
✔ 最佳答案
Given f(x) =2 / √xfind the derivative of f(x) by first principle
圖片參考：http://in.geocities.com/myisland8132/7007042100156.gif
2007-05-19 6:54 am
第5個等號那一行錯了
[sqrt(x) - sqrt(x + dx)][sqrt(x) + sqrt(x + dx)]
=x - (x + dx)
=x - x - dx
= - dx
所以答案欠 "-" 號
[sqrt(x) - sqrt(x + dx)][sqrt(x) + sqrt(x + dx)]
=x - (x + dx)
=x - x - dx
= - dx
所以答案欠 "-" 號
收錄日期: 2021-04-25 16:52:43
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