Question

Calcule os valores das seguintes expressões:

Answer 1

Resposta:

A) $\sqrt{49*81} = \sqrt{49} * \sqrt{81} = 7 * 9 = 63$

B) $\sqrt[3]{3} *\sqrt[3]{9} = 3\sqrt[3]{3}$

C) $\sqrt{\frac{25}{16} } = \frac{\sqrt{25} }{\sqrt{16} } = \frac{5}{4}$

D) $\frac{\sqrt{63} }{2\sqrt{7} } = \frac{\sqrt{7.3.3} }{2\sqrt{7} } = \frac{3\sqrt{7} }{2\sqrt{7} } * \frac{2\sqrt{7} } {2\sqrt{7} } = \frac{6.7}{4.7} = \frac{42}{28} = \frac{21}{14} = \frac{3}{2}$

F) $\sqrt[3]{3*5^{2}} * \sqrt[3]{3^{2}*5} = \sqrt[3]{75} * \sqrt[3]{45} = \sqrt[3]{5.5.3} * \sqrt[3]{5.3.3} = \sqrt[3]{5.5.3.5.3.3} = 5 * 3 = 15$