1.

Write the following intervals in set builder form. (i) (2, 5) (ii) [10, 7] (iii) [2, 10] (iv) [-5, 0]

Answer»

(i) (2, 5) = {x : x ∈ R, 2 < x < 5} 

(ii) [0, 7] = {x : x ∈ R, 0 ≤ x < 7} 

(iii) [2, 10] = {x : x ∈ R, 2 ≤ x < 10} 

(iv) [-5, 0] = {x : x ∈ R, -5 < x ≤ 0}


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