Question

coloque em ordem crescente (help aaaa)

Answer 1

Resposta:

Explicação passo a passo:

$A = \left(-2\right)^{-2}-3\cdot \:0.5^3$

$A = \frac{1}{2^2}-3\cdot \:0.5^3$

$A= 0.25-0.375$

$A= -0.125$

$B=\frac{1}{2}+\left(\frac{1}{2}\right)^2\left(-\frac{1}{2}\right)^{-3}$

se

$\left(\frac{1}{2}\right)^2\left(-\frac{1}{2}\right)^{-3} = -2$

então,

$B=\frac{1}{2}-2$

$B=-\frac{2\cdot \:2}{2}+\frac{1}{2}$

$B=\frac{-2\cdot \:2+1}{2}$

$B=\frac{-3}{2}$

$B=-1,5$

$C=\frac{-\frac{5}{4}-\left(-\frac{1}{2}\right)^2}{\left(\frac{2}{3}\right)^{-1}}$

$C=\frac{-\frac{5}{4}-\left(\frac{1}{2}\right)^2}{\left(\frac{2}{3}\right)^{-1}}$

$C=\frac{-\frac{5}{4}-\left(\frac{1}{2}\right)^2}{\frac{3}{2}}$

$C=\frac{-\frac{5}{4}-\frac{1}{2^2}}{\frac{3}{2}}$

$C=\frac{-\frac{5}{4}-\frac{1}{4}}{\frac{3}{2}}$

$C=\frac{\left(-\frac{5}{4}-\frac{1}{4}\right)\cdot \:2}{3}$

$C=\frac{2\left(-\frac{3}{2}\right)}{3}$

$C=-\frac{\frac{3}{2}\cdot \:2}{3}$

$C=-\frac{3}{3}$

$C=-1$

então,

$A>B>C$

$-0,125>-1>-1,5$