[tex]5 \frac{4}{9} = \frac{5\times 9 + 4}{9} = \frac{49}{9} [/tex]
[tex]d)( \frac{49}{9} )^{18} \div ( \frac{49}{9} )^{17} = (\frac{49}{9})^{18 - 1} = (\frac{49}{9} )^{1} = \frac{49}{9} [/tex]
La fel si la f)
[tex]4 \frac{4}{15} = \frac{4 \times 15 + 4}{15} = \frac{64}{15} [/tex]
[tex]( \frac{64}{15} )^{23} \div ( \frac{64}{15} ) ^{22} = \frac{64}{15} [/tex]
