Equation of a relation that appears to be its own reciprocal?

[blun]

What is an equation of a relation that appears to be its own reciprocal? :uhh:

 

[blun]

i have no clue

i need help..i dont know the answer...

 

[Tom Mattson]

How about f(x)=1?

 

[HallsofIvy]

Or f(x)=-1. That's about all I can think of!


You don't by chance mean "inverse" rather than "reciprocal"? They are very different but often confused.