Question

Me ajuda pfvr!! Resolva:

$(\frac{2}{3} ) {}^{ - 2} - ( \frac{1}{2} ) {}^{ - 1 } + ( - \frac{1}{4} ) {}^{ - 2}$
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Answer 1

Resposta:

65/14

Explicação passo-a-passo:

= (2/3)^ (-2) - (1/2)^ (-1) + (-1/4)^(-2)

= (3/2)^2 - (2)^1 + (-4)^2

= 9/4 - 2 + 16

= 9/4 + 14

= (9 + 4.14)/4

= (9+56)/14

= 65/14