請問要微分
ln( X/(X+2) )要怎麼算阿
ln的微分~不知道怎麼算
2012-09-26 10:52 pm
回答 (6)
2012-09-27 12:31 am
✔ 最佳答案
請問要微分ln[ x/(x+2)]要怎麼算阿Sol
d ln[ x/(x+2)]/dx
=dln x/dx－dln(x+2)/dx
=1/x－1/(x+2)
=2/[x(x+2)]
2014-05-29 3:30 pm
2014-05-28 3:50 pm
2014-05-27 12:25 pm
2014-05-24 1:27 pm
2012-09-26 11:07 pm
d(ln(x/(x+2)))/dx
=[d(ln(x/(x+2)))/d(x/(x+2)]*[d(x/(x+2))/dx]
=[(x+2)/x]*[2/(x+2)^2]
=2/(x(x+2))
=[d(ln(x/(x+2)))/d(x/(x+2)]*[d(x/(x+2))/dx]
=[(x+2)/x]*[2/(x+2)^2]
=2/(x(x+2))
參考: 頭腦
收錄日期: 2021-05-02 12:08:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120926000010KK03324