home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.math
- Path: sparky!uunet!snorkelwacker.mit.edu!galois!riesz!jbaez
- From: jbaez@riesz.mit.edu (John C. Baez)
- Subject: Re: Another GRE question for you folks
- Message-ID: <1992Oct12.221420.19382@galois.mit.edu>
- Sender: news@galois.mit.edu
- Nntp-Posting-Host: riesz
- Organization: MIT Department of Mathematics, Cambridge, MA
- References: <1992Oct12.003139.2290@merrimack.edu> <SMITH.92Oct12141247@gramian.harvard.edu>
- Date: Mon, 12 Oct 92 22:14:20 GMT
- Lines: 19
-
- In article <SMITH.92Oct12141247@gramian.harvard.edu> smith@gramian.harvard.edu (Steven Smith) writes:
-
- >Did the test really say ``the square root of 2,'' or did it use a
- >surd, i.e., _
- > \/2 ?
- >
- >By convention, the surd notation denotes the positive real root of a
- >positive number. If the ETS used a surd, their answer is correct, and
- >they can avoid yet another damaging article on the front page of the
- >Wall Street Journal.
- >
- >If they said ``the square root of 2'' or ``2^(1/2),'' they are
- >referring to a number x such that x^2 = 2, and the correct answer is D
- >by the reasons you stated.
-
- Surely if they say THE square root of 2 they are hinting that they believe
- there is a unique one, i.e., that they are forgetting the negative one.
-
-
-