Question

Daca A={3:4:5:6} si B={x|x=a supra b,a apartine A. b apartine A},atunci determinati aubmultiimile C,D si E ale mulotimii B formate din fractii zecimale, fractii periodice simple si respectiv periodice mixte.

Answer 1

fractiile care se pot forma sunt

B={3/3, 3/4, 3/5, 3/6,
4/3, 4/4, 4/5, 4/6,
5/3, 5/4, 5/5, 5/6,
6/3, 6/4, 6/5, 6/6}

C- fractii zecimale
C={3/3, 3/4, 3/5, 3/6, 4/4, 4/5, 5/4, 5/5, 6/3, 6/4, 6/5, 6/6}
D- fractii periodice simple
D={4/3, 4/6, 5/3}
5/6=0,8(3)
E-fractii periodice mixte
E={5/6}