Yahoo Answers: Answers and Comments for 唔識做功課48 [深水土步區]
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From yanyan
zhHantHK
Mon, 16 Feb 2015 23:12:48 +0000
3
Yahoo Answers: Answers and Comments for 唔識做功課48 [深水土步區]
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https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
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From 知足常樂: 很有禮貌。
敬祝各位新年進步！
╭∧∧╮
│ .✪‿✪ │
╰/)...
https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
Wed, 18 Feb 2015 16:12:57 +0000
很有禮貌。
敬祝各位新年進步！
╭∧∧╮
│ .✪‿✪ │
╰/) ⋈ (\\╯

From yanyan: thank you so much
https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
Mon, 16 Feb 2015 23:46:37 +0000
thank you so much

From SC147: 1. (log x^3 + 3log √y) ÷ (4log(xy...
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https://hk.answers.yahoo.com/question/index?qid=20150216000051KK00115
Mon, 16 Feb 2015 23:42:09 +0000
1. (log x^3 + 3log √y) ÷ (4log(xy)  log y^2)
= (log x^3 + log y ^3/2 ) ÷ (log (xy)^4  log y^2)
= (log x^3 * y ^3/2) ÷ (log x^4* y^2)
= log ( x^6/2 * y^3/2) ÷ log ( x^2* y)^2
= log (x^2 *y)^3/2 ÷ log (x^2 *y)^2
= 3/2 log (x^2 *y) ÷ 2 log(x^2 *y)
= 3/2 ÷2
= 3/4 (Answer)
2. If 1/2 log y = 1+ log x, express y in terms of x.
1/2 log y = 1+ log x
1/2 log y = log 10+ log x
log y^1/2 = log (10*x)
y^1/2 = (10*x)
( y^1/2)^2 = (10*x)^2
∴y = 100 x^2 (Answer)
20150217 00:31:06 補充：
希望幫到妳，相信我給妳的答案是正確。