dy/dx=dy/du．du/dx
１．有冇人可以解我知
/ 同．是咩意思？？
數學入邊／是除 ． 是乘
但微分不是，但我又不記得咩意思．．
２．dy/dx=dy/du．du/dx 點用？？
附加數,鏈式法則問題
2009-02-25 7:32 am
回答 (3)
2009-02-25 9:07 am
✔ 最佳答案
dy/dx=dy/du．du/dx基本上dy/dx是要當成一個整體去看。dy/dx當然不是指dy除dx。.則是正常的乘
舉例：
令y=sin^2x
則dy/dx=(dy/du)(du/dx) 其中u=sinx
=2sinxcosx
2009-02-25 9:45 pm
dy / dx
d
=---- ( y )
dx
= rate of change of y w.r.t. x
Even though it is not equla to (dy) / (dx), fundamentally it comes from (delta y) / (delta x).
Useful in approximation.
d
=---- ( y )
dx
= rate of change of y w.r.t. x
Even though it is not equla to (dy) / (dx), fundamentally it comes from (delta y) / (delta x).
Useful in approximation.
參考: Myself
2009-02-25 8:01 am
跟小學學的/(除)可以看成一樣
收錄日期: 2021-04-26 13:06:11
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https://hk.answers.yahoo.com/question/index?qid=20090224000051KK02287