Inverse Functions - Cool math Algebra Help Lessons - How To Tell If Two Functions Are Inverses

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Coolmath Algebra
Inverse Functions Lesson 4 - How To Tell If Two Functions Are Inverses (page 2 of 3)
---- This algebra lesson explains how to tell if two functions are inverses of each other

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Let's do another easy one we already know:

f( x ) = x^2 ... for x is greater than or equal to 0

and

3 ) f( square root( x ) ) = ( square root( x ) )^2 = x

2 ) g( f( x ) ) = square root( f( x ) )

3 ) g( x^2 ) = square root( x^2 ) = x

Uh... Did you notice something weird too?

We got x's again.

That's no coincidence, Baby!

Continued on the next page

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