Question

Quem é fera em matemática ? preciso de uma ajuda.

Desde já muito obrigado!

Answer 1

Explicação passo-a-passo:

1)

$[\frac{2^{-1} - (-2)^{-1}}{(\frac{1}{2})^{-1}}]\\\\\frac{ \frac{1}{2}-(- \frac{1}{2})}{\frac{1}{2}-1} \\\\ \\\frac{\frac{1}{2}+\frac{1}{2}}{-\frac{1}{2} } \\\\\frac{1}{-\frac{1}{2} } \\\\-2$

2)

$\frac{3*2^{-2}-2*3^{-2}}{(3*2)^{-2}} \\\\\frac{3*\frac{1}{4} -2*\frac{1}{9} }{6^{-2} } \\\\\frac{\frac{3}{4}-\frac{2}{9}}{\frac{1}{36}}\\\\\frac{\frac{27}{36}-\frac{8}{36} }{\frac{1}{36}} \\\\19$

3)

$\frac{1*10^{-5}*(1*10^{-2})^{2}*10^{3}}{10^{3} } \\\\\frac{1*10^{-5}*(1*10^{-4})*10^{3}}{10^{3} }\\\\\frac{10^{-6} }{10^{3} }\\ \\10^{-3} \\\\0,001$

Espero ter ajudado!