Question

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Answer 1

$(\frac{81}{16}) {}^{ \frac{ - 3}{4} } (( { \frac{25}{9} })^{ \frac{ - 3}{2} } \div ( \frac{5}{2} ) {}^{ - 3} ) = 1$

$( \frac{16}{81} ) {}^{ \frac{3}{4} } \times ( \frac{9}{5}) {}^{ \frac{3}{2} } \times ( \frac{5}{2} ) {}^{3}$

$( \frac{2}{3} ) {}^{3} \times { \frac{3}{5} }^{3} \times \frac{125}{8}$

$\frac{8}{27} \times \frac{27}{125 } \times \frac{125}{8}$

$1$