[tex]\frac{4}{9}*(\frac{16}{81} )^5 = \frac{4}{9}*((\frac{4}{9})^2 )^5 = \frac{4}{9}* (\frac{4}{9})^{10}=(\frac{4}{9})^{1+10} =(\frac{4}{9})^{11}\\\\korzystamy\ ze\ wzoru:\\\\a^n*a^m=a^{n+m}[/tex]
