$\"\"$

The functions are $\"\"$ and $\"\"$ .

For all real numbers $\"\"$ ,the greatest integer function returns the largest integer

less than or equal to $\"\"$ .

The function is $\"\"$ .

Property of greatest integer function: $\"\"$ , where $\"\"$ is not an integer.

$\"\"$

$\"\"$ .

The functions $\"\"$ and $\"\"$ differ by $\"\"$ .

$\"\"$

The functions $\"\"$ and $\"\"$ differ by $\"\"$ .