MAT 120 WEEK 5 DISCUSSION

MAT 120 WEEK 5 DISCUSSION 
The composition function f(g(x)) = x^4 + 2x^2 + 1.  If g(x) = x^2  then what is f(x)?  Once you find f(x), find the function g(f(x)).  

Can you think of times  in solving problems that this will be a useful rule to know?

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