Problem

Let f(x)=1x2 and g(x)=2x+2.
Then (fg)(x)=
(gf)(x)=

Answer

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Answer

Therefore, we have (fg)(x)=x2 and (gf)(x)=2x2.

Steps

Step 1 :Let f(x)=1x2 and g(x)=2x+2.

Step 2 :The composition of two functions, f and g, denoted as (fg)(x) or f(g(x)), is a function that applies g to its input, and then f to the result.

Step 3 :Similarly, (gf)(x) or g(f(x)) is a function that applies f to its input, and then g to the result.

Step 4 :To find (fg)(x), we need to substitute g(x) into f(x), and to find (gf)(x), we need to substitute f(x) into g(x).

Step 5 :The composition of the functions f and g is given by (fg)(x)=x2 and (gf)(x)=2x2.

Step 6 :Therefore, we have (fg)(x)=x2 and (gf)(x)=2x2.

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