According the the definition of most Hong Kong secondary maths textbook, Surd is an irrational number involving a radical sign.
Is "sq root of pi" a surd?
Is "2 + cubic root of 3" a surd? (Some textbooks say it should be a surd expression, not a surd.)
So, can I re-define surd as the following?
Surd is an irrational number involving a single n-th root radical sign, where n is an integer greater than 1, and where the number inside the radical sign is a rational number.
Thank you.
Definition of surd
2014-06-01 8:23 pm
回答 (2)
2014-06-08 9:30 am
✔ 最佳答案
Surd = an expression containing one or more irrational roots of numbers; for example, Ö7, 6 + Ö5, or Ö3 + 2Ö11A pure surd contains only irrational term; a mixed surd also contains rational terms. Note:Ö = square root signI think Yahoo editor can't display square root sign2014-06-08 19:23:43 補充：
To 暑期小貓 ( 知識長 ):
Thank you for showing me how to input the square root sign, " √ ".
Wow! I can do it now!
Thanks once again.
2014-06-09 2:35 am
Dear Godfrey, this is the square root sign: " √ "
You can use copy-and-paste method or you can input the ASCII code.
In some machines, you can type (hold) Alt + 251.
In some machines, you can type (hold) Alt + 41428.
2014-06-09 11:50:44 補充：
You are so welcome~
☆ヾ(◕‿◕)ノ
Cheers!
(◕‿◕✿)
You can use copy-and-paste method or you can input the ASCII code.
In some machines, you can type (hold) Alt + 251.
In some machines, you can type (hold) Alt + 41428.
2014-06-09 11:50:44 補充：
You are so welcome~
☆ヾ(◕‿◕)ノ
Cheers!
(◕‿◕✿)
收錄日期: 2021-04-11 20:44:23
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140601000051KK00057