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What is (f•g)( x)?

f(x)=x^3-4x+2 

g(x)=x^2+2 

(f•g)(x)= 

 Jun 13, 2018
 #1
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(f•g)(x) --> f(g(x))
Basically, where there is an x, replace it with g(x), in this case x2+2

f(x)=x3-4x+2

f(x2+2)=(x2+2)3-4(x2+2)+2
           =x6+6x4+12x2+8-4x2-8+2
           =x6+6x4+8x2+2

 Jun 13, 2018

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