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# Fraction reciprical problem

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Intern
Joined: 30 Dec 2011
Posts: 33
GMAT Date: 02-11-2012
GPA: 3.51
WE: Law (Law)
Followers: 0

Kudos [?]: 8 [0], given: 8

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13 Feb 2012, 08:41
This one should seem easy, but for some reason I can't get the right answer. Just a question from a random math site.

(1/(x^-2))^-3

Thanks,
Math Expert
Joined: 02 Sep 2009
Posts: 34478
Followers: 6291

Kudos [?]: 79803 [0], given: 10022

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13 Feb 2012, 08:47
fcvald01 wrote:
This one should seem easy, but for some reason I can't get the right answer. Just a question from a random math site.

(1/(x^-2))^-3

Thanks,

$$(\frac{1}{x^{-2}})^{-3}=(x^2)^{-3}=x^{2*(-3)}=x^{-6}=\frac{1}{x^6}$$.

For more on the this subject check Exponents chapter of Number theory: math-number-theory-88376.html

Hope it helps.

P.S. Please post answer choices for PS problems, if available. If it's not a GMAT PS question then post it in Main Math Forum.
_________________
Intern
Joined: 30 Dec 2011
Posts: 33
GMAT Date: 02-11-2012
GPA: 3.51
WE: Law (Law)
Followers: 0

Kudos [?]: 8 [0], given: 8

### Show Tags

13 Feb 2012, 09:05
Thank you, will do.
Re: Fraction reciprical problem   [#permalink] 13 Feb 2012, 09:05
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