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# 2^(4-1)^2/ 2^(3-2)= a) 2^8 b) 2^7 c) 2^6 d) 2^5 e) 2^4

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Manager
Joined: 04 Jan 2009
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08 Jan 2009, 18:21
This question is really confusing.

2^3^2 is not=2^3*2^3
its equal to 2^9.
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tusharvk

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08 Jan 2009, 18:22
dont consider it as (2^3)^2. If it was meant that way there would have been parantheses around 2^3.

(x^y)^z is definitely = x^(yz)

but x^y^z is not. Think in terms of base and exponent. Simplify the exponent first.

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Manager
Joined: 02 Aug 2007
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08 Jan 2009, 18:42
Thanks guys, now it makes sense

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Re: GMATPrep - Exponents   [#permalink] 08 Jan 2009, 18:42

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