呢兩條點做..?呢兩條點做..?呢兩條點做..?呢兩條點做..?呢兩條點做..?
圖片參考：http://i364.photobucket.com/albums/oo87/davis1991411/partialfractions.jpg
partial fraction
2010-09-26 1:26 am
回答 (3)
2010-09-26 1:59 am
✔ 最佳答案
Part 1:圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/26-6.jpg
Part 2:
圖片參考：http://i707.photobucket.com/albums/ww74/stevieg90/27-5.jpg
2010-09-25 18:36:52 補充：
Yes...我是假設了y係常數
2010-09-25 18:54:25 補充：
If the pics cannot be shown, please visit:
http://i707.photobucket.com/albums/ww74/stevieg90/26-6.jpg
http://i707.photobucket.com/albums/ww74/stevieg90/27-5.jpg
2010-09-26 2:05 am
要視乎x,y那個是variable.若只有x是variable,則Stevie-G已提供答案,若只有y是variable,則會有一個類似的解,若x,y同時是variable,似乎沒有解.
2010-09-26 1:55 am
1. 1/(x^3+y^3)
=1/[(x+y)(x^2-xy+y^2)]
2. 1/(x^3-y^3)
=1/[(x-y)(x^2+xy+y^2)]
=1/[(x+y)(x^2-xy+y^2)]
2. 1/(x^3-y^3)
=1/[(x-y)(x^2+xy+y^2)]
收錄日期: 2021-04-22 00:53:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100925000051KK01138