Răspuns :
[tex]A=\{x\:\in\:\mathbb{Z}\:|-7<2x-1<5\}[/tex]
[tex] - 7 < 2x - 1 < 5 \: | + 1[/tex]
[tex] - 6 < 2x < 6 \: | \div 2[/tex]
[tex] - 3 < x < 3[/tex]
[tex]x \: \in \: \{ - 2, - 1,0,1,2 \}[/tex]
[tex]A= \{ - 2, - 1,0,1,2 \}[/tex]
[tex] = > cardA = 5[/tex]
[tex] - 7 < 2x - 1 < 5 \: | + 1[/tex]
[tex] - 6 < 2x < 6 \: | \div 2[/tex]
[tex] - 3 < x < 3[/tex]
[tex]x \: \in \: \{ - 2, - 1,0,1,2 \}[/tex]
[tex]A= \{ - 2, - 1,0,1,2 \}[/tex]
[tex] = > cardA = 5[/tex]