請大家幫我計下:
2^x = 5
x=?
我想問問什麼是log?
有否一點兒例題?
有否一點獨特的例子?
thanks..
簡易數學..about log..一點唔明白..
2008-07-19 5:57 am
回答 (3)
2008-07-19 6:07 am
✔ 最佳答案
2^x=5take log on both sides
log(2^x)=log5
xlog2=log5---------log(a^b)=bloga
x=log5/log2~2.32(corr. to 3 sig. fig.)
log是一以10為基數的對數函數
y=logx , x=10^y
例子其實與你這題亦大同小異....
2008-07-31 5:53 pm
log 100 = 2
help you remember
help you remember
2008-07-19 8:39 am
收錄日期: 2021-04-23 20:46:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080718000051KK02878