a)
[tex](1 \frac{2}{3} {)}^{3} = ( \frac{5}{3} {)}^{3} = \frac{5}{3} \times \frac{5}{3} \times \frac{5}{3} = \frac{125}{27} = 4 \frac{17}{27} [/tex]
b)
[tex](2 \frac{1}{5} {)}^{2} = ( \frac{11}{5} {)}^{2} = \frac{11}{5} \times \frac{11}{5} = \frac{121}{25} = 4 \frac{21}{25} [/tex]
c)
[tex]( - 1 \frac{3}{4} {)}^{2} = ( - \frac{7}{4} {)}^{2} = ( - \frac{7}{4} )( - \frac{7}{4} ) = \frac{49}{16} = 3 \frac{1}{16} [/tex]
d)
[tex]( - 2 \frac{1}{2} {)}^{3} = ( - \frac{5}{2} {)}^{3} = ( - \frac{5}{2} )( - \frac{5}{2} )( - \frac{5}{2} ) = - \frac{125}{8} = - 15 \frac{5}{8} [/tex]
