Question

Rezolvati doar ex 18 si 19
(dau coroana+90 puncte)

Answer 1

Răspuns:

18. a) 71/330= 0, (215)  => x= 2

b) 241/101= 2,(3861)     x= 8   y=6

c) $\frac{x8y4z}{99900}$       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) $\frac{n}{n+1} =\frac{1}{2}$  $\frac{2}{3} =\frac{3}{4} ...$

b) $\frac{n+1}{2n+3}$= $\frac{2}{5} =\frac{3}{2*2+3} =\frac{3}{7} =\frac{6}{15}$=...

c)$\frac{3n-5}{4n-7} =\frac{4}{5} =\frac{7}{9}$     (n=3,4,5...)

d) $\frac{6n+7}{7n+8} =\frac{13}{15} =\frac{19}{22}$...