Set-builder form of set A = $\Big{\dfrac{1}{2}, \dfrac{2}{3}, \dfrac{3}{4}\Big}$ is :

1. ${\Big{x = \dfrac{n}{n + 1}, n ∈ N \text{ and } n > 1\Big}}$

2. ${\Big{x = \dfrac{n - 1}{n - 2}, n ∈ N \text{ and } n > 2\Big}}$

3. ${\Big{x = \dfrac{n}{n + 1}, n ∈ N \text{ and } 1 < n < 2\Big}}$

4. ${\Big{x = \dfrac{n}{n + 1}, n ∈ N \text{ and } 1 ≤ n < 4\Big}}$

Write the following set in roster (Tabular) form :

A₁ = {x : 2x + 3 = 11}

Write the following set in roster (Tabular) form :

A₃ = {x : x ∈ Z, -3 ≤ x < 4}

Write the following set in roster (Tabular) form :

A₄ = {x : x is a two digit number and sum of the digits of x is 7 }