Question

simplify and express each as a rational number:​

Answer 1

Answer:

$2). {(\frac{ - 7}{ 8} )}^{ - 3} \times ({ \frac{ - 7}{8} })^{2} \\ = { (\frac{ - 7}{8}) }^{ - 3 + 2} \\ = { (\frac{ - 7}{8} )}^{ - 1} \\ = \frac{ - 8}{7}$

$3). { (\frac{4}{3} )}^{ - 3} \times {( \frac{4}{3} )}^{ - 2} \\ = { (\frac{4}{3}) }^{ - 3 - 2} \\ = {(\frac{4}{3} )}^{ - 5} \\ = { \frac{3}{4} }^{5} \\ = \frac{243}{1024}$

Answer 2

Answer:

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