state gov TSPSC DAO (Divisional Accounts Officer) Mock Test 2024 Mathematics Sets Set Theory and types of Sets
Which of the following set is the empty set ?
1
{x: x + 4 = 7}
2
{x : 7 < x < 8, x is a natural number}
3
{x: x2 - x = 2}
4
{x: x2 - 3x + 2 = 0}