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 3 of 3)
---- This algebra lesson explains how to tell if two functions are inverses of each other

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If		or		,
then f(x) and g(x) are inverse functions.

So, you really only need to check one of them!

Check it out:

Are these inverse functions?

and

3 ) f( ( 1 / 2 )x + ( 5 / 2 ) ) = 2( ( 1 / 2 )x + ( 5 / 2 ) ) - 5 = x + 5 - 5 = x ... Yep!

You can double-check it by crunching

YOUR TURN:

Are these inverse functions?

and

Are these inverse functions?

and

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