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- From: smith@gramian.harvard.edu (Steven Smith)
- Newsgroups: sci.math
- Subject: Re: Another GRE question for you folks
- Message-ID: <SMITH.92Oct12141247@gramian.harvard.edu>
- Date: 12 Oct 92 19:12:47 GMT
- References: <1992Oct12.003139.2290@merrimack.edu>
- Sender: usenet@das.harvard.edu (Network News)
- Organization: Harvard Robotics Lab, Harvard University
- Lines: 31
- In-Reply-To: nin15b66@merrimack.edu's message of 12 Oct 92 00:31:39 GMT
-
- nin15b66@merrimack.edu writes:
-
- > This one came from a sample GRE test.
- >
- > It is one where you have to choose A if the one on the left is
- > greater, B if the one on the right is greater, C if they are equal
- > or D if it can't be determined.
- >
- > Column A Column B
- > 4 + 2*the square root of 2 2 + 4*the square root of 2
- >
- > The answer they gave is B.
- >
- > I disagreed though, and before I go embarrassing myself with a
- > nasty letter to ETS, I wanted to check with the experts on the
- > subject.
-
- 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.
-
- Steven Smith
-