Question

a letra b
não consigo fazer​

Answer 1

Resposta: $\frac{11}{7}$

Explicação passo-a-passo:

$\frac{\frac{1}{2}+2.\frac{2}{3}  }{\frac{1}{2}+\frac{2}{3} }$

$\frac{\frac{1}{2}+\frac{4}{3} }{\frac{7}{6} }$

$\frac{\frac{11}{6} }{\frac{7}{6} }$

$\frac{11}{7}$

Answer 2

Operações com frações:

A) $a^{2}+ba^{2}+a+b$

$(\frac{1}{2})^{2}+(\frac{2}{3}.\frac{1}{2})^{2}+\frac{1}{2}+\frac{2}{3}\\\\\frac{1}{4}+(\frac{2}{6})^{2}+\frac{1*3+2*2}{2*3}\\\\\frac{1}{4}+\frac{4}{36}+\frac{7}{6}=\frac{52}{144}+\frac{7}{6} =\frac{1320}{864}=\boxed{\frac{55}{36}}$

B) $\frac{a+2b}{a+b}$

$\frac{1}{2}+2(\frac{2}{3}):\frac{1}{2}+\frac{2}{3}\\\\\frac{1}{2}+\frac{4}{6}:\frac{1*3+2*2}{2*3}\\\\\frac{14}{12}:\frac{7}{6}=\frac{14}{12}*\frac{6}{7}=\frac{84}{84}=\boxed{1}$

Espero que seja isso!