( 2-(2)^(1/2) )^(1/2) / ( 2+(2)^(1/2) )^(1/2)
更新1:
答案係 ( (2)^(1/2) - 1 ) / 2 請列明詳細步驟,因為我唔係好明....
更新2:
SORRY,係 (2)^(1/2) - 1 ....
關於化簡數式的問題!!
回答 (1)
2008-05-14 8:38 pm
✔ 最佳答案
[√(2-√2)]/[√(2+√2)]={[√(2-√2)][√(2-√2)]/[√(2+√2)][√(2-√2)]
=[√(2-√2)^2]/[√(4-2)]
=(2-√2)/(√2)
=(2-√2)(√2)/(√2)(√2)
=(2√2-2)/2
=√2-1
收錄日期: 2021-04-26 13:03:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080514000051KK00490