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# If m=−2, what is −m^−m?

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Manager
Joined: 05 Nov 2012
Posts: 163

Kudos [?]: 40 [0], given: 57

If m=−2, what is −m^−m? [#permalink]

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19 Dec 2012, 23:27
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Difficulty:

55% (hard)

Question Stats:

34% (00:30) correct 66% (00:19) wrong based on 125 sessions

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If m=−2, what is −m^−m?

A. −16
B. −4
C. −1/4
D. 1/4
E. 4

Source HULT
[Reveal] Spoiler: OA

Kudos [?]: 40 [0], given: 57

Manager
Joined: 05 Nov 2012
Posts: 163

Kudos [?]: 40 [0], given: 57

Re: If m=−2, what is [#permalink]

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19 Dec 2012, 23:29
I thought this to be a poor quality question because they did not mention either - m^-m or (-m)^-m..... i took it for the second one and flipped the sign... Am I being wrong in understanding GMAT presentation?

Kudos [?]: 40 [0], given: 57

Manager
Joined: 08 Apr 2012
Posts: 128

Kudos [?]: 110 [1], given: 14

Re: If m=−2, what is [#permalink]

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19 Dec 2012, 23:31
1
KUDOS
Amateur wrote:
If m=−2, what is −m^−m?
−16

−4

−1/4

1/4

4

SOurce HULT

This is a pretty simple one that can be solved by substitution. But take it step by step and simplify. But the confusion in the questions is whether the - sign in the base is with 2 or outside. In the absence of bracket, we'll take it outside..

$$-m^{-m}$$, m = -2
=> $$-(2^{-(-2)})$$
=>$$-2^2$$
=-4
_________________

Shouvik
http://www.Edvento.com

Kudos [?]: 110 [1], given: 14

Senior Manager
Joined: 13 Aug 2012
Posts: 458

Kudos [?]: 556 [0], given: 11

Concentration: Marketing, Finance
GPA: 3.23
Re: If m=−2, what is [#permalink]

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20 Dec 2012, 00:30
Amateur wrote:
If m=−2, what is −m^−m?
−16
−4
−1/4
1/4
4

$$=-(-2)^{-(-2)}=-(-2)^2=-4$$

_________________

Impossible is nothing to God.

Kudos [?]: 556 [0], given: 11

Math Expert
Joined: 02 Sep 2009
Posts: 42248

Kudos [?]: 132538 [0], given: 12324

Re: If m=−2, what is [#permalink]

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20 Dec 2012, 03:11
Amateur wrote:
I thought this to be a poor quality question because they did not mention either - m^-m or (-m)^-m..... i took it for the second one and flipped the sign... Am I being wrong in understanding GMAT presentation?

If it were $$(-m)^{-m}$$ it would be written as $$(-m)^{-m}$$ not as $$-m^{-m}$$.
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Kudos [?]: 132538 [0], given: 12324

SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1852

Kudos [?]: 2707 [0], given: 193

Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: If m=−2, what is −m^−m? [#permalink]

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25 Mar 2014, 01:52
m = -2 so -m = 2

$$- (-2)^2$$

= -4 = Answer
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Kudos [?]: 2707 [0], given: 193

Re: If m=−2, what is −m^−m?   [#permalink] 25 Mar 2014, 01:52
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# If m=−2, what is −m^−m?

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