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Write the following sets in interval form. 

(i) {x : x ∈ R, a < x < b} 

(ii) {x : x ∈ R, 3 < x ≤ 5} 

(iii) {x : x ∈ R, 0 ≤ x < 8} 

(iv) {x : x ∈ R, -1 ≤ x ≤ 5}

1 Answer

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Best answer

(i) {x : x ∈ R, a < x < b} = (a, b) 

(ii) {x : x ∈ R, 3 < x ≤ 5} = [3, 5] 

(iii) {x : x ∈ R, 0 ≤ x < 8}= [0, 8] 

(iv) {x : x ∈ R, -1 ≤ x ≤ 5} = [-1, 5]

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