Question

Помогите пожалуйста,очень надо.​

Answer 1

Ответ:

1)

$\frac{15 {}^{9} \times 15 {}^{5} }{15 {}^{13} } = \frac{15 {}^{14} }{15 {}^{13} } = 15$

2)

$5 {}^{15} \times 5 {}^{ - 17} \times 5 {}^{4} = 5 {}^{ - 2} \times 5 {}^{4} = 5 {}^{2} = 25$

3)

$\frac{0.4 {}^{11} }{0.4 {}^{4} \times 0.4 {}^{5} } = \frac{0.4 {}^{11} }{0.4 {}^{9} } = 0.4 {}^{2} = 0.16$

4)

$8 {}^{ - 2} \times 4 {}^{3} = \frac{1}{64} \times64 = 1$

5)

$9 {}^{0} \div 9 {}^{ - 2} = 1 \div \frac{1}{81} = 1 \times 81 = 81$

6)

$7 {}^{8} \times 7 {}^{ - 5} \times 7 {}^{ - 4} = 7 {}^{3} \times 7 {}^{ - 4} = 7 {}^{ - 1} = \frac{1}{7}$