Question

срочно
віддам 100 балів​

Answer 1

1) Г

${8}^{ - \frac{1}{3} } = (2 {}^{3} ) {}^{ - \frac{1}{3} } = {2}^{3 \times ( - \frac{1}{3} )} = {2}^{ - 1} = \frac{1}{2} = 0.5$

2) Б

$\sqrt{8} + \sqrt{2} = \sqrt{4 \times 2} + \sqrt{2} = 2 \sqrt{2} + \sqrt{2} = 3 \sqrt{2}$

3) Д

$( \sqrt{7} - \sqrt{2} )( \sqrt{7} + \sqrt{2} ) = ( \sqrt{7} ) {}^{2} - ( \sqrt{2} ) {}^{2} = 7 - 2 = 5$

4) В

$( \frac{7 {}^{ \frac{3}{4} } \times 2 {}^{ \frac{3}{4} } }{2 {}^{ - \frac{1}{4} } \times 14} ) {}^{4} = \frac{7 {}^{3} \times {2}^{3} }{2 {}^{ - 1} \times 14 {}^{4} } = \frac{7 {}^{3} \times 2 {}^{4} }{2 {}^{4} \times 7 {}^{4} } = \frac{1}{7}$