Question

SOCOROOO POR FAVORRR
CALCULE O VALOR DAS EXPRESSÕES NUMERICAS ABAIXO.

Answer 1

$a) \\ \\ (-2)^3 - 3^-^1 \\ \\ \\ - 8 - \dfrac{1}{3} \\ \\ \\ \dfrac{3 * -8 - 1}{3} \\ \\ \\ \dfrac{-24 - 1}{3} \\ \\ \\ => \dfrac{-25}{3}$

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$b) \\ \\ 5^0 +5^-^1 + 5^-^2 \\ \\ \\ 1 + \dfrac{1}{5} + \dfrac{1}{25} \\ \\ \\ \dfrac{25 +5*1 + 1 }{25} \\ \\ \\ => \dfrac{31}{25}$

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$c) \\ \\ \dfrac{2^0 + 2^-^1}{3^0 - 3^-^1} \\ \\ \\ \\ \dfrac{1 + \dfrac{1}{2} }{1 - \dfrac{1}{3}} \\ \\ \\ \dfrac{ \dfrac{3}{2} }{ \dfrac{2}{3}} \ passa\ multiplicando \ e \ inverte\ a\ fracao \\ \\ \\ \dfrac{3}{2} * \dfrac{2}{3} \\ \\ \\ => \dfrac{9}{4}$

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$d) \\ \\ (\dfrac{1}{2})^-^1 +(\dfrac{1}{2})^-^2 \\ \\ \\ inverte \ a \ fracao\ \\ \\ \\ \dfrac{2}{1} + \dfrac{2^2}{1} \\ \\ \\ 2 + 4 => 6$