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1. ${[2 - {(3^{- 1})}^{- 1}]}^{- 1}$

Answer: Option D

Explanation:

{[2 - {(3^{- 1})}^{- 1}]}^{- 1} = {[2 - {(\frac{1}{3})}^{- 1}]}^{- 1} = {[2 - 3]}^{- 1} = \frac{- 1}{1} = - 1

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