[tex]C=\left \{ x=\frac{a}{b}\:|\:a\:\in\:\left \{ -2,1,3 \right \}\:si\:b\:\in\:\left \{ -4,0,5\right \}\right \}[/tex]
[tex]pt. \: a = - 2 \: si \: b = - 4 = > x = \frac{ - 2}{ - 4} = \frac{1}{2} [/tex]
[tex]pt. \: a = - 2 \: si \: b = 0 = > x \: nu \: exista[/tex]
[tex]pt. \: a = - 2 \: si \: b = 5 = > x = - \frac{2}{5} [/tex]
[tex]pt. \: a = 1 \: si \: b = - 4 = > x = - \frac{1}{4} [/tex]
[tex]pt. \: a = 1 \: si \: b = 0 = > x \: nu \: exista[/tex]
[tex]pt. \: a = 1 \: si \: b = 5 = > x = \frac{1}{5} [/tex]
[tex]pt . \: a = 3 \: si \: b = - 4 = > x = - \frac{3}{4} [/tex]
[tex]pt. \: a = 3 \: si \: b = 0 = > x \: nu \: exista[/tex]
[tex]pt. \: a = 3 \: si \: b = 5 = > x = \frac{3}{5} [/tex]
[tex] = > C=\left \{ \frac{1}{2},-\frac{2}{5} ,-\frac{1}{4},\frac{1}{5},-\frac{3}{4},\frac{3}{5}\right \}[/tex]
