Question

Dadas as leis das funções f e g:
f (x)= 5x
g (x)=x-4
obtenha:

a) g (f (x))
b) f (g (x))
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Answer 1

g(f(x))

f(x)=5x -> g(5x)=x-4 ->g(5x)=5x-4

f(g(x))

g(x)=x-4 ->f(x-4)=5x ->f(x-4)=5(x-4) ->f(x-4)=5x-20