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For how many integers n is −1 2 = n −1 ? (A) None (B) One (C) Two (D)

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Carcass
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For how many integers n is −1 2 = n −1 ? (A) None (B) One (C) Two (D) [#permalink] New post   16 Aug 2021, 01:35
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For how many integers n is \(−1^2 = n^{−1}\) ?

(A) None
(B) One
(C) Two
(D) Three
(E) More than three


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Question part of the project GRE Quant/Math Extreme Challenge Daily (2021) Edition
GRE - Math Book
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B
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Re: For how many integers n is −1 2 = n −1 ? (A) None (B) One (C) Two (D) [#permalink] New post   16 Aug 2021, 21:55
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Carcass wrote:
For how many integers n is \(−1^2 = n^{−1}\) ?

(A) None
(B) One
(C) Two
(D) Three
(E) More than three


\(−1^2 = n^{−1}\)

\(-1 = \frac{1}{n}\)

\(n = \frac{1}{-1} = -1\)

Hence, option B
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Re: For how many integers n is −1 2 = n −1 ? (A) None (B) One (C) Two (D) [#permalink]
16 Aug 2021, 21:55
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