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Exponents

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Manager
Joined: 29 May 2008
Posts: 111

Kudos [?]: 122 [0], given: 0

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09 Oct 2009, 13:29
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Question Stats:

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

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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

Kudos [?]: 122 [0], given: 0

Math Expert
Joined: 02 Sep 2009
Posts: 41892

Kudos [?]: 129034 [0], given: 12187

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09 Oct 2009, 13:54
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.
_________________

Kudos [?]: 129034 [0], given: 12187

Re: Exponents   [#permalink] 09 Oct 2009, 13:54
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