Question

Va rog rezolvati punctul c)!

Answer 1

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Answer 2

Explicație pas cu pas:

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

${\left( - \frac{1}{3}\right)}^{ - 3} \cdot \frac{b}{a} = - 3$

${( - 3)}^{3} \cdot \frac{b}{a} = - 3$

$\frac{b}{a} = \frac{3}{ {3}^{3} } \implies \red{\bf \frac{b}{a} = \frac{1}{9}}$