Question

помогите алгебра 9 класс

Answer 1

Ответ:

$1) {3}^{ - 1} = \frac{1}{3}$

$2)6$

$3)1 \frac{2}{7}$

$4)5$

Объяснение:

$1){27}^{ - 3} \div {81}^{ - 2} = {3}^{ - 9} \div {3}^{ - 8} = {3}^{ - 1} = \frac{1}{3}$

$2) \frac{ { - 36}^{ - 3} \times {6}^{4} }{ {216}^{ - 4} \times ( { - 6}^{9} ) } = \frac{ {6}^{ - 6} }{ {6}^{ - 12} \times {6}^{5} } = {6}^{1} = 6$

$3) \frac{ {21}^{5} \times {3}^{ - 7} }{ {63}^{ - 2} \times {7}^{8} } = \frac{ {7}^{7} \times {3}^{7} }{ {3}^{5} \times {7}^{8} } = \frac{ {3}^{2} }{7} = 1 \frac{2}{7}$

$4) \frac{ {0.2}^{6} \times {25}^{7} }{ {125}^{ - 3} } = \frac{ {5}^{6} \times {5}^{ - 14} }{ {5}^{ - 9} } = {5}^{15} \times {5}^{ - 14} = 5$