Question

Dada a f(x) = 2x – 3 e g(x) = x – 6 encontre:
a) fg(-2)
b) gf(3)
c) fg(x) = 0

Answer 1

Resposta:

Explicação passo a passo:

f(g(-2))=

g(-2)=-2-6=-8

f(g(-2))=2.(-8)-3=-16-3=-19

g(f(3))=

f(3)=3-6=-3

g(f(-3))=-3-6=-9

f(g(x))=0

f(g(x))=

2.(x-6)-3=0

2x-12-3=0

2x-15=0

2x=0+15

2x=15

x=15/2