有無人可以幫我化簡....
http://one.xthost.info/159357/img035.jpg
由上邊個條化簡至下邊個條....
由於唔識打..寫左出黎...請勿見怪- -"
唔該要步驟..
化簡數學-.-”
2008-12-15 5:16 am
回答 (2)
2008-12-15 5:29 am
✔ 最佳答案
62 ( 2^1/2)/(2^1/2-1) <-- 2^1/2=2的開方根=62 ( 2^1/2)/(2^1/2-1) x ((2^1/2+1)/(2^1/2+1) <--(2^1/2+1)/(2^1/2+1)=1
=62 ( 2^1/2)(2^1/2+1)/(2-1) <--(a+b)(a-b)=a^2-b^2
=62 ((2^1/2)^2+2^1/2)
=62(2+2^1/2)
2008-12-15 5:30 am
Easy~
(62√2)(√2-1) * (√2+1) / (√2+1)
= (62√2 )*(√2+1)
=62*2 + 62√2
=62(2+√2)
REMARK: (√2+1)/(√2+1) = 1
(62√2)(√2-1) * (√2+1) / (√2+1)
= (62√2 )*(√2+1)
=62*2 + 62√2
=62(2+√2)
REMARK: (√2+1)/(√2+1) = 1
參考: 第一次俾心機去答嫁~俾個最佳我啦~~~
收錄日期: 2021-04-29 21:43:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081214000051KK02096