Question

2. Fie Determină: BnQ= BnZ = {5,(6); √7;2;-√81;-2-3√5. 25/6) -3.55. B-Q=​

Answer 1

$5,(6)=5\frac{6}{9}=\frac{17}{3} \\ -\sqrt{81}=-9 \\ \\ \\ \\ \\ \\ \\ \\ \\ B∩\mathbb{Q}=\{\frac{17}{3},-\frac{2}{3}\} \\ B∩\mathbb{Z}=\{2,-9\} \\ B-\mathbb{Q}=\{\sqrt{7},2,-9,-3\sqrt{5}\}$