Question

Alguém poderia me ajudar?

Answer 1

Resposta:

Item C)

Explicação passo-a-passo:

$f(x)=x^{2}-x-2\\\\f(-2)=(-2)^{2}-(-2)-2=4+2-2=4\\\\e\\\\g(x)=1-2x\\\\g(-2)=1-2.(-2)=1+4=5\\\\Assim\\\\f(-2)=4\\e\\g(-2)=5\\\\f(g(-2))=f(5)=5^{2}-5-2=25-7=18\\\\e\\\\g(f(-2))=g(4)=1-2.4=1-8=-7$