Question

1) calcule
$a)( \frac{3}{4} ) {}^{2}$
$b)( - 3) {}^{3}$
$c)( \frac{2}{3} ) {}^{ - 3}$

Answer 1

$A)\ \\(\frac{3}{4})^2= \frac{3^2}{4^2}=\ \textgreater \ \boxed {\frac{9}{16}} \\\\ B)\\ (-3)^3=-3\cdot-3\cdot-3=\ \textgreater \ \boxed{-27} \\\\ C)\\ (\frac{2}{3})^{-3}=(\frac{3}{2})^3= \frac{3^3}{2^3} = \boxed{\frac{27}{8}}$