A = [−3, 4) B = {x ∈ R : −4 < x ≤ 2 or x > 3} Determine A ∪ B and write the answer in interval notation. (1)

Question

A = [−3, 4) B = {x ∈ R : −4 < x ≤ 2 or x > 3}

Answer 1

A∪B={x∈ℝ:-4<x≤2, 4 | x>3} because A is a subset of B. I use “|” to mean “or”.

Answer 2

A or B = { -3, -2, -1, 0, 1, 2, 4, 5, 6, 7, 8, 9, 10, 11........  }