# Finite Math Examples

Function is said to be injective or one-to-one if every element in the range is an image of at most one element from the domain.

An injective function is called a one-to-one function

Since is on the right side of the equation, switch the sides so it is on the left side of the equation.

Subtract from both sides of the equation.

Take the square root of both sides of the equation to eliminate the exponent on the left side.

First, use the positive value of the to find the first solution.

Next, use the negative value of the to find the second solution.

The complete solution is the result of both the positive and negative portions of the solution.

There is more than value for some values, which means that is not an equation of a function.

Not Injective (Not One-to-One)