Resposta:
[tex]\left(\frac{1}{9+0.888}\right)^3+\left(\frac{5.7-7}{9}\right)=-0.14341\dots[/tex]
Explicação passo a passo:
[tex]\mathrm{Remover\:os\:parênteses}:\quad \left(a\right)=a\\=\left(\frac{1}{9+0.888}\right)^3+\frac{5.7-7}{9}\\\\=\frac{1}{9.888^3}-\frac{1.3}{9}\\\\=0.00103\dots -0.14444\dots \\\\\mathrm{Subtrair:}\:0.00103\dots -0.14444\dots =-0.14341\dots \\=-0.14341\dots[/tex]
