[tex]a] \ \frac{4^2}{3}=\frac{4\cdot4}{3}=\frac{16}{3}=5\frac{1}{3}\\\\b] \ \frac{4}{3^2}=\frac{4}{3\cdot3}=\frac{4}{9}\\\\c] \ \frac{4^2}{3^2}=\frac{4\cdot4}{3\cdot3}=\frac{16}{9}=1\frac{7}{9}\\\\d] \ (\frac{4}{3})^2=\frac{4^2}{3^2}=\frac{16}{9}=1\frac{7}{9}[/tex]
