Réponse :
Bonsoir,
N = [tex]\frac{11}{7} + \frac{9}{14} +\frac{3}{28}[/tex]
= [tex]\frac{4*11}{4*7} + \frac{2*9}{2*14} +\frac{3}{28}[/tex]
= [tex]\frac{44}{28} + \frac{18}{28} + \frac{3}{28}[/tex]
= [tex]\frac{65}{28}[/tex]
P = [tex](\frac{2}{10} + \frac{1}{30} ) - (\frac{1}{5} - \frac{1}{15})[/tex]
= [tex](\frac{3*2}{3*10} + \frac{1}{30}) - (\frac{6*1}{6*5} - \frac{2*1}{2*15})[/tex]
= [tex]\frac{6}{30} + \frac{1}{30} - (\frac{6}{30} - \frac{2}{30})[/tex]
= [tex]\frac{7}{30} - \frac{6}{30} + \frac{2}{30}[/tex]
= [tex]\frac{3}{30} = \frac{1}{10}[/tex]
Q = [tex](\frac{7}{6} + \frac{7}{4}) - \frac{7}{12}[/tex]
= [tex]\frac{2*7}{2*6} + \frac{3*7}{3*4} - \frac{7}{12}[/tex]
= [tex]\frac{14}{12} + \frac{21}{12} - \frac{7}{12}[/tex]
= [tex]\frac{28}{12}[/tex]
= [tex]\frac{7}{3}[/tex]
Voilà bonne soirée ! ;)
