- #1

dpa

- 147

- 0

## Homework Statement

Do all the preimages on X need to have a (and of course I know only one but) image in Y for the f:x->y to be injective?

**IS THE FOLLOWING FUNCTION INJECTIVE SINCE ONE ELEMENT OF FIRST DOES NOT HAVE ANY IMAGE**

## Homework Equations

## The Attempt at a Solution

Thank You.