Question

Va rog ajutati-ma cu acest exercitiu!

Answer 1

$C=\left \{ x=\frac{a}{b}\:|\:a\:\in\:\left \{ -2,1,3 \right \}\:si\:b\:\in\:\left \{ -4,0,5\right \}\right \}$

$pt. \: a = - 2 \: si \: b = - 4 = > x = \frac{ - 2}{ - 4} = \frac{1}{2}$

$pt. \: a = - 2 \: si \: b = 0 = > x \: nu \: exista$

$pt. \: a = - 2 \: si \: b = 5 = > x = - \frac{2}{5}$

$pt. \: a = 1 \: si \: b = - 4 = > x = - \frac{1}{4}$

$pt. \: a = 1 \: si \: b = 0 = > x \: nu \: exista$

$pt. \: a = 1 \: si \: b = 5 = > x = \frac{1}{5}$

$pt . \: a = 3 \: si \: b = - 4 = > x = - \frac{3}{4}$

$pt. \: a = 3 \: si \: b = 0 = > x \: nu \: exista$

$pt. \: a = 3 \: si \: b = 5 = > x = \frac{3}{5}$

$= > C=\left \{ \frac{1}{2},-\frac{2}{5} ,-\frac{1}{4},\frac{1}{5},-\frac{3}{4},\frac{3}{5}\right \}$