Scientific notation
回答 (1)
2008-10-17 12:40 am
✔ 最佳答案
(8x10^5/3.4x10^-1)^-2 = { (8 x 10^5) / (3.4 x 10^-1) }^-2
= { (8 x 10^5) / [ (3.4) x (1 / 10) ] }^-2
= 1 / { (8 x 10^5) / [ (3.4) x (1 / 10) ] }^2
= 1 / { (8 x 10^6 / 3.4 }^2
= 1 / { (8 x 10^6 ) ^2 / (3.4) ^2 }
= (3.4^2) / 64 x 10^12
= (3.4^2) / (6.4 x 10^13)
希望可以幫到你.
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https://hk.answers.yahoo.com/question/index?qid=20081012000051KK00428