u = x^3 + 5 => du = 3x^2 dx 為何最後要加dx?
回答 (2)
2016-11-21 9:52 am
✔ 最佳答案
SolU=x^3+5
dU/dx
=d(x^3+5)/dx
=3x^2
So
dU/dx=3x^2
dU=3x^2dx
2017-01-05 8:27 pm
微分之通式也
收錄日期: 2021-04-23 22:11:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161121015003AAMUJkB