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Exponents

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Exponents [#permalink] New post 09 Oct 2009, 12:29
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

100% (01:16) correct 0% (00:00) wrong based on 3 sessions
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
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Re: Exponents [#permalink] New post 09 Oct 2009, 12:54
Expert's post
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.
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Re: Exponents   [#permalink] 09 Oct 2009, 12:54
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