Inverse Functions - Cool math Algebra Help Lessons - How to Tell If a Function Has an Inverse Function (One-to-One)

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Coolmath Algebra
Inverse Functions Bonus Lesson - How to Tell If a Function Has an Inverse Function (One-to-One) (page 3 of 3)
---- This algebra lesson gives an easy test to see if a function has an inverse function

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Graphing Calculator	Scientific Calculator	<< a new window will open for these

Check back... Remember that I said we had to restrict it to

Well, here's the graph of

for

Oh!

THIS guy IS one-to-one!

Get it now?

You saw why this is such a big stinkin' deal in the second section.

YOUR TURN:

Does

have an inverse function?

* Just graph it and see if it's one to one.

Does

have an inverse function?

If it doesn't, fix it so that it does.

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