Question

Repede va rog frumos

Answer 1

Răspuns:

x∈N

x-1 ≤ 4

x ≤ 4+1

x ≤ 5

A∈ {0,1,2,3,4,5}

Answer 2

Răspuns: $\bf A= \{0,1,2,3,4,5\}$

Explicație pas cu pas:

Salutare!

$\bf A = \{x\in\mathbb N | x-1\leq 4\}$

$\bf x-1\leq 4\:\:\Big|+1$

$\bf x-1+1\leq 4+1$

$\bf x\leq 5 \implies x\in \{0,1,2,3,4,5\}$

$\bf A= \{0,1,2,3,4,5\}$, varianta (d) in cazul problemei tale

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