- #1

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## Homework Statement

I need to find an example of a set D[itex]\subseteq[/itex]

**R**is compact but f

^{-1}(D) is not.

## Homework Equations

f

^{-1}(D) is the pre-image of f(D), not the inverse.

## The Attempt at a Solution

I'm having trouble visualizing a function that would work for this scenario. Any clues would be helpful.