Question

Помогите пожалуйста !!!

Answer 1

Ответ:

• а)

${7}^{ - 3} = \frac{1}{ {7}^{3} } = \frac{1}{343}$

• б)

$18 \times {2}^{ - 4} = 18 \times \frac{1}{ {2}^{4} } = \frac{18}{ {2}^{4} } = \frac{9 \times 2}{ {2}^{4} } = \frac{9}{ {2}^{3} } = \frac{9}{8} = 1 \frac{1}{8} = 1.125$

• в)

${(125 \times {5}^{ - 5} )}^{2} = {( \frac{125}{ {5}^{5} } )}^{2} = {( \frac{ {5}^{3} }{ {5}^{5} } )}^{2} = \frac{ {5}^{6} }{ {5}^{10} } = \frac{1}{ {5}^{4} } = \frac{1}{625}$

• г)

$\frac{ {6}^{ - 4} \times {6}^{3} }{ {6}^{ - 2} } = \frac{ {6}^{2} \times {6}^{3} }{ {6}^{4} } = \frac{ {6}^{5} }{ {6}^{4} } = 6$