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EIV guide 3 4th edition page 176 problem 10 answer help

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tomslawsky
 Post subject: EIV guide 3 4th edition page 176 problem 10 answer help
 Post Posted: Wed Feb 17, 2010 3:03 pm 
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Students


Posts: 134
this should e easy- im just not seeing how the answer is derived.

The problem is ((20th root of(sqrt 2))^10

I disected it this way:

Sqrt 2= 2^1/2

Threfore, the question = (((2^1/2)^1/20)^10)

and 1/2*1/20*10= 10/40= 1/4

therefore my answer is 2^1/4 = (fourth root of 2), and NOT the (second root of 2)

How bad did I muff this one up?

Thank you.
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tomslawsky
 Post subject: Re: EIV guide 3 4th edition page 176 problem 10 answer help
 Post Posted: Thu Feb 18, 2010 12:33 pm 
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Students


Posts: 134
Never mind, I got it. The radical sign is only 20th root, not square root, too. These are the simple things that frustrate me- understand the concept, set up proper equation and screw up the arithmetic!
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Ben Ku
 Post subject: Re: EIV guide 3 4th edition page 176 problem 10 answer help
 Post Posted: Thu Feb 25, 2010 12:50 am 
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ManhattanGMAT Staff


Posts: 824
It's helpful to often take a second glance at the problem if you get stuck somewhere. The problems in the quant are often reading problems.

_________________
Ben Ku
Instructor
ManhattanGMAT
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