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# Negative Exponents

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Intern
Joined: 29 Nov 2017
Posts: 1

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29 Nov 2017, 12:47
Hi all. This question is from the OG 2018. I was able to get the right answer, however I am puzzled by their solution particularly why they made m^-1 = -1/3 when the question says m^1 = 1/3. Any ideas?
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Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4667

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29 Nov 2017, 14:36
cgorges wrote:
Hi all. This question is from the OG 2018. I was able to get the right answer, however I am puzzled by their solution particularly why they made m^-1 = -1/3 when the question says m^1 = 1/3. Any ideas?

Dear cgorges,

My friend, this is a mistake. The people who create the GMAT OG are human beings, and they made mistakes. This is a mistake, plain and simple.

Does this make sense?
Mike
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Mike McGarry
Magoosh Test Prep

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Math Expert
Joined: 02 Sep 2009
Posts: 47167

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29 Nov 2017, 20:52
cgorges wrote:
Hi all. This question is from the OG 2018. I was able to get the right answer, however I am puzzled by their solution particularly why they made m^-1 = -1/3 when the question says m^1 = 1/3. Any ideas?
Attachment:
IMG_5233.JPG

Sent from my iPhone using GMAT Club Forum mobile app

Corrected version of this question is discussed here: https://gmatclub.com/forum/if-m-1-1-3-t ... l#p1158988
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Re: Negative Exponents &nbs [#permalink] 29 Nov 2017, 20:52
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