Question

Calculati: a) D6 U intors D8 b) D8 U intors D12 c) D12 U intors D18 d) D24 U intors D36

Answer 1

$\cap -$ reprezinta intersectia a doua multimi si cuprinde numai elementele din ambele multimi.

$D_{6} \ \cap D_{8} = \{1,2\}$

$D_{6} = \{1, 2 ,3 ,6\} \\\\D_{8} = \{1, 2 , 4 , 8\}$

$D_{8} \ \cap D_{12} = \{1,2,4\}$

$D_{8} = \{1, 2 , 4 , 8\} \\\\D_{12} = \{1, 2, 3 , 4 , 6 , 12\}$

$D_{12} \ \cap D_{18} = \{1,2,3,6\}$

$D_{12} = \{1, 2, 3 , 4 , 6 , 12\} \\\\D_{18} = \{ 1, 2, 3 ,6 , 18\}$

$D_{24} \ \cap D_{36} = \{1,2,3,3,6,12\}$

$D_{24} = \{1, 2 , 3 , 4 ,6 , 12 , 24 \} \\\\D_{36} = \{1, 2 , 3 , 4 ,6 , 12 ,18 ,36 \}$