Write the set $\left\{\frac{1}{2}, \frac{2}{3}, \frac{3}{4}, \frac{4}{5}, \frac{5}{6}, \frac{6}{7}\right\}$ in the set-builder form.
Write the following sets in roster form :
$A = \{ x:x$ is an integer and $ - 3 < x < 7\} $
Write down all the subsets of the following sets
$\{ a,b\} $
In the following state whether $A=B$ or not :
$A=\{a, b, c, d\} ; B=\{d, c, b, a\}$
Which of the following sets are finite or infinite.
$\{1,2,3 \ldots .\}$