Answer :
the Greatest Integer Function is also known as Floor Function
he floor function, denoted bxc is a function R → Z. Its value is the largest integer that is less than or equal to x.
so it has two values so for sure it has not one - one function
and since the image can have two values but not he pre-image so it is not onto function
he floor function, denoted bxc is a function R → Z. Its value is the largest integer that is less than or equal to x.
so it has two values so for sure it has not one - one function
and since the image can have two values but not he pre-image so it is not onto function