Question

Write down the following sets using set-builder notation:

A set A of all numbers greater than 3
A set B of all numbers less than 4
A set Y of all months of the year with more than 30 days
A set W of all days of a week

Answer 1

A = { x:x >3 ,where x --> R}

B = { x:x <4, where x --> R}

Y = { x:x is month of year with more than 30 days}

W = { x:x is all days of a week}