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07 Sep 2003, 21:02
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Hi, I hope this is the right place to ask this question.
As far as the GMAT is concerned, does the symbol for the square root of a number (don't know how to type it here) mean the positive square root only?
For example, even though there are 2 numbers whose square is 9, if I see square root 9 on the gmat, should I assume it means the positive number 3 only?
Thank you very much!
As far as the GMAT is concerned, does the symbol for the square root of a number (don't know how to type it here) mean the positive square root only?
For example, even though there are 2 numbers whose square is 9, if I see square root 9 on the gmat, should I assume it means the positive number 3 only?
Thank you very much!
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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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19 Jan 2004, 12:15
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qrt of 9 is + or -3. You cannot assume it is always +3
What is the value of X ?
1) x <> 0
2) x^2 - 9 = 0
Here X^2-9 = 0 means x^2 = 9 or x = +3 or x= -3
one cannot say for sure. However I believe it is safe to assume that the number inside the sqrt sign is +ve
What is the value of X ?
1) x <> 0
2) x^2 - 9 = 0
Here X^2-9 = 0 means x^2 = 9 or x = +3 or x= -3
one cannot say for sure. However I believe it is safe to assume that the number inside the sqrt sign is +ve
19 Jan 2004, 22:02
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Yes. If x^2 = 9, then that will give us x = +3 or -3
But sqrt(x) = |x| (ALWAYS)
But sqrt(x) = |x| (ALWAYS)
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
