If m=9^(x−1), then in terms of m, 3^(4x−2) must be which of : GMAT Problem Solving (PS)
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# If m=9^(x−1), then in terms of m, 3^(4x−2) must be which of

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Intern
Joined: 09 Mar 2011
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Location: Mumbai
Schools: ISB, Insead, Harvard, Wharton
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If m=9^(x−1), then in terms of m, 3^(4x−2) must be which of [#permalink]

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01 Sep 2012, 21:05
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If m=9^(x−1), then in terms of m, 3^(4x−2) must be which of the following?

A. m/3
B. 9m
C. 9m^2
D. m^2/3
E. m^2/9
[Reveal] Spoiler: OA

Last edited by Bunuel on 02 Sep 2012, 01:02, edited 1 time in total.
Renamed and edited the question.
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Re: Easiest and Quickest way to solve this ? [#permalink]

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01 Sep 2012, 21:48
m = 9 ^ (X-1)
m = 3 ^ (2x-2)
m^2 = 3 ^ (4x-4)
9m^2 = 3 ^ (4x-2)
Re: Easiest and Quickest way to solve this ?   [#permalink] 01 Sep 2012, 21:48
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# If m=9^(x−1), then in terms of m, 3^(4x−2) must be which of

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