Exponents : PS Archive
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# Exponents

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Manager
Joined: 29 May 2008
Posts: 113
Followers: 1

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09 Oct 2009, 12:29
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Difficulty:

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Question Stats:

100% (01:16) correct 0% (00:00) wrong based on 3 sessions

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This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How do you solve this?

If q is an odd integer greater than 1, What is the value of (-1)^(q+1)
A) -2
B) -1
C) 0
D) 2
E) cannot be determined
Math Expert
Joined: 02 Sep 2009
Posts: 36638
Followers: 7106

Kudos [?]: 93663 [0], given: 10583

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09 Oct 2009, 12:54
TheRob wrote:
How do you solve this?

If q is an odd integer greater than 1, What is the value of (-1)^(q+1)
A) -2
B) -1
C) 0
D) 2
E) cannot be determined

q is an odd integer>1 --> q+1 is even integer>2. -1 in even power is 1. Negative number (not necessarily integer) in odd power - negative and in even power positive. -1 in odd power =-1; -1 in even power=1.

So answer is 1. No correct choice.

Maybe there is a typo and the question says "q is an even integer"? If so answer would be -1.
_________________
Re: Exponents   [#permalink] 09 Oct 2009, 12:54
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