F4 數學log 一問

2014-04-24 7:01 am
如題,求以下數學題,關於log的

1. If 10^x=1/y,then log y= ?
2. If 10^a=3 and 10^b=5,then 開方6=?

回答 (4)

2014-05-01 3:32 pm
To Panda :

與其分身投票,倒不如努力學習。
以後就不會寫出 「10^a = 3」然後「log(10^a) = 3」那麼醜陋的錯誤了。

就算你分身投票勝出,也只會把這醜陋的錯誤留給大家「欣賞」。

冷眼旁觀 上
2014-04-24 8:43 am
My maths isn't as good as the 2 experts that are answering u ,but i still try!

1. log(y) = log* (1/x)

2. 2a=6
root 2a =root 6

;)
2014-04-24 7:44 am
1. 10^x = 1/y
xlog10 = 1/y
x(1) = 1/y
x = 1/y
y = 1/x
logy = log(1/x)

2. 10^a = 3
alog10 = 3
a(1) = 3
2a = 6
開方2a = 開方6
參考: me


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