Write the set $A = \{ 1,4,9,16,25, \ldots .\} $ in set-builder form.
$A = \{ x:x \ne x\} $ represents
Examine whether the following statements are true or false :
$\{ a\} \in \{ a,b,c\} $
Assume that $P(A)=P(B) .$ Show that $A=B$.
Which of the following sets are finite or infinite.
The set of months of a year