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QUESTION 4

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Source: — Problem Solving |
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by cramya » Wed Nov 26, 2008 9:27 pm
Expand (3^x-1) ^3 ((a^b)^c = a^ (b*c) where a=3 b=x-1 c=3)

3^(3x-3)

= 3^3x/ 3 ^3
= sqrt(3^6x) / 27
= sqrt(8100) / 27
= 90/27
= 10/3

I think one of the choices should be 10/3 since 10/0 is undefined.
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