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ventivish
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The tricky part to this question is the way the answer choices are presented.

[9] = 27 or [9]=9*3
[6] = 3 or [6]=1/2*6

27*3 = 81. This is not an answer choice they want it in [form]

81 is odd so we can use the formula given to know that [27] = 3*27=81
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Thanks for your explanation!
I would never get that from the question because I was reading this in the form of
[9]=3m,
m=3
and[6]=1/2m,
m=12.



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