http://www2.hkedcity.net/sch_files/a/kst/kst-06185/public_html/e.jpg
plz click the hyperlink.
and explain why.
thz
strange phenomena
2008-01-27 3:42 am
回答 (1)
2008-01-27 4:17 am
✔ 最佳答案
其實係好簡單﹐因為你運算錯誤(-y^2/2)^3=-y^3/8
而你將個負號與(-y)合併經平方後變成正號!!
2008-01-26 20:18:30 補充：
打錯了(-y^2/2)^3=-y^6/8
收錄日期: 2021-04-25 16:57:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080126000051KK03085