Salut!
a) [tex]\frac{3}{10} si \frac{4}{5} ^{(2} => \frac{3}{10} si \frac{4*2}{5*2} => \frac{3}{10} si \frac{8}{10}[/tex]
b) [tex]\frac{3}{4}^{(3} si \frac{12}{5} => \frac{3*3}{4*3} si \frac{5}{12} => \frac{9}{12} si \frac{5}{12}[/tex]
c) [tex]\frac{2}{15} si \frac{8}{3} ^{(5} => \frac{2}{15} si \frac{8*5}{3*5} => \frac{2}{15} si \frac{40}{15}[/tex]
d) [tex]\frac{7}{6}^{(3} si \frac{5}{18} => \frac{7*3}{6*3} si \frac{5}{18} => \frac{21}{18} si \frac{5}{18}[/tex]
Succes!