exponential function
回答 (2)
2013-11-05 6:34 am
✔ 最佳答案
(a+b)^-1/a^-1+b^-1=a/(a+b)+1/b
=(ab+a+b)/(a(a+b))
if you asked "(a+b)^-1/(a^-1+b^-1)":
(a+b)^-1/(a^-1+b^-1)
=(1/(a+b) )/ (a+b)/(ab))
=ab/(a+b)^2
2013-11-05 2:37 pm
小紫雲 星空副帳 講得好岩, 括號必須清晰~
>> (a+b)^-1直接得出1/(a+b)?
>> 正確!
>> (a+b)^-1直接得出1/(a+b)?
>> 正確!
收錄日期: 2021-04-13 19:47:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20131104000051KK00172