![](https://i.imgur.com/Aj3jduA.jpg)
[理工] 線積分
![](https://i.imgur.com/Aj3jduA.jpg)
為什麼積分路徑要取順時針方向?題目又沒說
如果我取逆時針方向會差一個負號,是錯誤的嗎?
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