Are the following pair of sets equal ? Give reasons.
$A = \{ x:x$ is a letter in the word ${\rm{FOLLOW }}\} $
$B = \{ y:y$ is a letter in the word $WOLF\} $
$A = \{ x:x$ is a letter in the word ${\rm{FOLLOW }}\} $
$B = \{ y:y$ is a letter in the word $WOLF\} $
The order in which the elements of a set are listed is not significant.
$\therefore A=B$
If a set $A$ has $n$ elements, then the total number of subsets of $A$ is
Write the following as intervals :
$\{ x:x \in R, - 12\, < \,x\, < \, - 10\} $
Examine whether the following statements are true or false :
$\{a\} \subset\{a, b, c\}$
The number of non-empty subsets of the set $\{1, 2, 3, 4\}$ is
Write the solution set of the equation ${x^2} + x - 2 = 0$ in roster form.