Question

2- O valor da expressão 2^−1 + 6 ∙ ( 2/3 ) −2 − (− 1/3 ) −1 é:​

Answer 1

Resposta:

$\frac{11}{6}$

Explicação passo a passo:

$2^{-1}+6\left(\frac{2}{3}\right)-2-\left(-\frac{1}{3}\right)-1$

$=2^{-1}+6\cdot \frac{2}{3}-2+\frac{1}{3}-1$

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

$=\frac{1}{2}+4-2+\frac{1}{3}-1$

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

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

$=\frac{6}{6}+\frac{3}{6}+\frac{2}{6}$

$=\frac{6+3+2}{6}$

$=\frac{11}{6}$