Which of the following is the empty set

  • A

    $\{ x:x$ is a real number and ${x^2} - 1 = 0\} $

  • B

    $\{ x:x$ is a real number and ${x^2} + 1 = 0\} $

  • C

    $\{ x:x$ is a real number and ${x^2} - 9 = 0\} $

  • D

    $\{ x:x$ is a real number and ${x^2} = x + 2\} $

Similar Questions

In the following state whether $\mathrm{A = B}$ or not :

$A = \{ x:x$ is a multiple of $10\} ;B = \{ 10,15,20,25,30 \ldots  \ldots \} $

Write the following intervals in set-builder form :

$\left[ {6,12} \right]$

The number of non-empty subsets of the set $\{1, 2, 3, 4\}$ is

Let $A=\{1,2,3,4,5,6\} .$ Insert the appropriate symbol $\in$ or $\notin$ in the blank spaces:

$ 8\, .......\, A $

Which of the following are sets ? Justify your answer.

The collection of questions in this chapter.