Which of the following sets are finite or infinite.
$\{1,2,3, \ldots 99,100\}$
$\{1,2,3 \ldots 99,100\}$ is a finite set because the numbers from $1$ to $100$ are finite in number.
Write the solution set of the equation ${x^2} + x – 2 = 0$ in roster form.
Which of the following is the empty set
State which of the following sets are finite or infinite :
$\{ x:x \in N$ and $x$ is prime $\} $
Let $A$ and $B$ be two non-empty subsets of a set $X$ such that $A$ is not a subset of $B$, then
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\} $
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