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If x^(-2) = 1/4, then x^(-4) =

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Math Expert
Joined: 02 Sep 2009
Posts: 58370
If x^(-2) = 1/4, then x^(-4) =  [#permalink]

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01 Apr 2018, 10:31
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Difficulty:

5% (low)

Question Stats:

94% (00:35) correct 6% (00:26) wrong based on 80 sessions

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If $$x^{(-2)} = \frac{1}{4}$$, then $$x^{(-4)} =$$

(A) -16
(B) -1/16
(C) 1/16
(D) 4
(E) 16

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Joined: 05 Feb 2016
Posts: 168
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If x^(-2) = 1/4, then x^(-4) =  [#permalink]

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01 Apr 2018, 10:35
Bunuel wrote:
If $$x^{(-2)} = \frac{1}{4}$$, then $$x^{(-4)} =$$

(A) -16
(B) -1/16
(C) 1/16
(D) 4
(E) 16

x^(-2) = 1/4
squaring both side then x^(-4)=1/16

Option C
If x^(-2) = 1/4, then x^(-4) =   [#permalink] 01 Apr 2018, 10:35
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If x^(-2) = 1/4, then x^(-4) =

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