jaidynh jaidynh
  • 21-09-2020
  • Mathematics
contestada

Find f(g(3)).

f(x) = 2x-5
g(x) = 1+x^2

f(g(3)) = ?

Respuesta :

tomson1975
tomson1975 tomson1975
  • 21-09-2020

Greetings from Brasil...

For the composite function f(g(x)), just replace the function g(x) in the x of f(x):

f(x) = 2x - 5

g(x) = 1 + x²

then

f(g(x)) = 2 · (1 + x²) - 5

f(g(x)) = 2 + 2x² - 5

and

f(g(3)) = 2 + 2 · (3)² - 5

f(g(3)) = 15

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