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- Path: sparky!uunet!ulowell!m2c!nic.umass.edu!noc.near.net!news.cs.brandeis.edu!binah.cc.brandeis.edu!TRAVIS
- From: travis@binah.cc.brandeis.edu (Leopold Travis)
- Newsgroups: sci.math
- Subject: Re: Another GRE question for you folks
- Message-ID: <1992Oct15.195539.11357@news.cs.brandeis.edu>
- Date: 15 Oct 92 19:55:39 GMT
- References: <1992Oct12.003139.2290@merrimack.edu> <SMITH.92Oct12141247@gramian.harvard.edu>,<1992Oct12.221420.19382@galois.mit.edu>
- Sender: news@news.cs.brandeis.edu (USENET News System)
- Reply-To: travis@binah.cc.brandeis.edu
- Organization: Brandeis University
- Lines: 30
-
- In article <1992Oct12.221420.19382@galois.mit.edu>, jbaez@riesz.mit.edu
- (John C. Baez) writes:
- >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.
-
- Absolutely. If they were referring to some number x such that x^2=2,
- they would have said _a_ square root of 2.
-
- --
- Leopold Travis | It's just not within the scheme of things
- travis@binah.cc.brandeis.edu | To give up your life so easily
- | That's not the way you're meant to be
- | What a waste of time and energy
- | -Erasure
-