Question

Write the following intervals in set-builder form :

(i) (- 3,0)

(ii) 16,12}

(iii) (6,12]

(iv) [- 23,5)

Answer 1

(i) (- 3,0) = {x :x ∈ R, -3 ≤ x ≤ 0}

(ii) [6,12] = {x:x ∈ P,6 ≤ x ≤ 12}

(iii) (6,12] = {x :x ∈ R, 6 ≤ x ≤ 12}

(iv) [-23, 5) = {x :x ∈ R, -23 ≤ x ≤ 5}