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What is the value of a^-2*b-3

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Source: — Data Sufficiency |
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by vk_vinayak » Sun Aug 26, 2012 12:51 am
alex.gellatly wrote:What is the value of (a^-2)(b^-3)
1. (a^-3)(b^-2) = 36^-1
2. ab^-1 = 6^-1

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Question: What is 1/(a^2. b^3)

Stsmt1: (a^3)(b^2) = 36. or (a^2)(b^3) = 36 (b/a). INSUF
Stmt 2: a/b = 1/6. INSUF.

Combined: (a^2)(b^3) = 36 * (1/6) = 6. SUF

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