Inverse Functions - Cool math Algebra Help Lessons

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Coolmath Algebra
Inverse Functions Lesson 3 - Composition of Functions (page 3 of 7)
---- This algebra lesson explains how to do composition of functions

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TRY IT:

Given

OK, so what if you had this:

f( x ) = 2x^2 + 5 ... f( blob ) + 2( blob )^2 + 5

Now, what if I told you to replace the word "blob" with "x+3" ?

f( blob ) = 2( blob )^2 + 5 ... f( x + 3 ) = 2( x + 3 )^2 + 5

This is the game! First, we do the blob thing. Then, we get with the notation and put the g(x) in... Then, we replace that g(x) with whatever g(x) really is. Don't worry. It's easy!

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