Răspuns:
18. a) 71/330= 0, (215) => x= 2
b) 241/101= 2,(3861) x= 8 y=6
c) [tex]\frac{x8y4z}{99900}[/tex] nu se vede....
19. o fractie este ireductibila cand nu se poate imparti exact
inlocuiesti n cu numere naturale fara 0 ( 1,2,3,4,5,6,7,8,9...)
a) [tex]\frac{n}{n+1} =\frac{1}{2}[/tex] [tex]\frac{2}{3} =\frac{3}{4} ...[/tex]
b) [tex]\frac{n+1}{2n+3}[/tex]= [tex]\frac{2}{5} =\frac{3}{2*2+3} =\frac{3}{7} =\frac{6}{15}[/tex]=...
c)[tex]\frac{3n-5}{4n-7} =\frac{4}{5} =\frac{7}{9}[/tex] (n=3,4,5...)
d) [tex]\frac{6n+7}{7n+8} =\frac{13}{15} =\frac{19}{22}[/tex]...
