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.Find (g o f)(x) for f(x) = 2x + 4 and g(x) = x^2 . Show all of your work, it'll help me for my next one ! (: thanks

Find g o fx for fx 2x 4 and gx x2 Show all of your work itll help me for my next one thanks class=

Respuesta :

nobrains
You should know that (g o f)(x) is the same as g(f(x)), or g of f(x). To solve for g(f(x)), substitute whatever f(x) equals as x into g(x).

So, if you have the two functions
g(x) = x^2
f(x) = 2x + 4, 
you substitute what f(x) equals as x into the g(x) equation.
[tex]g(x) = x^2 \\ g(f(x)) = (f(x))^2 \\ g(f(x)) = (2x + 4)^2 \\ g(f(x)) = 4x^2 + 16x + 16[/tex]

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