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Y=X^1/2 is the same as Y=+/sqrt(X) ? 
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#1
Feb1212, 04:02 AM

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1. The problem statement, all variables and given/known data
This is from a textbook: Y=X^1/2 is the same as Y=+/sqrt(X) 2. Relevant equations 3. The attempt at a solution 100^1/2=10 How is 100^1/2=10 also true? Thanks. 


#2
Feb1212, 05:12 AM

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hi solve!
(which book?) 


#3
Feb1212, 05:36 AM

P: 94

As for the book, I dont wanna name it and make the otherwise excellent textbook look bad. 


#4
Feb1212, 12:47 PM

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Y=X^1/2 is the same as Y=+/sqrt(X) ?
RGV 


#5
Feb1212, 01:17 PM

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On the other hand, if the author is explaining how to solve y^{2} = x, for y, or solve y^{2} = 100 for y, then the answers are:
y = ± √(x) = ±(x)^{1/2} for y^{2} = xIf this is the case you have only told us part of what the textbook was claiming, although the author may have also left a few details out of her/his explanation. 


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