The question is in this link:
http://i407.photobucket.com/albums/pp158/ah-tee/cos.jpg
URGENT! Derivative problem
2008-11-19 2:57 pm
回答 (1)
2008-11-19 5:17 pm
✔ 最佳答案
The answer is as follows:圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/20081119_mat_1.jpg?t=1227057365
收錄日期: 2021-04-24 09:52:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081119000051KK00187