Question

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Answer 1

Explicación paso a paso:

$( { \frac{1}{2} }^{ - 2} + 2( { \frac{1}{3} })^{ - 2} + { \frac{1}{3} }^{ - 3} )^{ - 0.5} = ( {2}^{2} + 2 \times {3}^{2} + {3}^{3} )^{ - 0.5} = (4 + 18+ 27)^{ - 0.5} = 49 ^{ - 0.5} = (\frac{1}{49} )^{0.5} = \frac{1}{7}$