Question

Pergunta 2: A = { x ∈ ℝ/ -1 ≤ x ≤ 2 } e B = { x ∈ ℝ/ 0 ≤ x ≤ 5 }, determine A U B: *
1 ponto
[-1, 0]
[-1, 5]
[-1, 2]
]0, 5]

Answer 1

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$\sf A=\{x\in\mathbb{R}/-1\leq x\leq 2\}\implies A=[-1,0,1,2]\\\sf B=\{x\in\mathbb{R}/0\leq x\leq 5\}\implies B=[0,1,2,3,4,5]\\\sf A\cup B=[-1,0,1,2,3,4,5]\implies A\cup B=[-1,5]$