Răspuns: [tex]\bf A= \{0,1,2,3,4,5\}[/tex]
Explicație pas cu pas:
Salutare!
[tex]\bf A = \{x\in\mathbb N | x-1\leq 4\}[/tex]
[tex]\bf x-1\leq 4\:\:\Big|+1[/tex]
[tex]\bf x-1+1\leq 4+1[/tex]
[tex]\bf x\leq 5 \implies x\in \{0,1,2,3,4,5\}[/tex]
[tex]\bf A= \{0,1,2,3,4,5\}[/tex], varianta (d) in cazul problemei tale
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