Question

sendo f(x) = 2x + 1 e g(x)= x²-x o valor de f (g(-1) ) é ?

Answer 1

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

f(g(-1)) = ?

Obs.: f(x) = y ; g(x) = y

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

f(g(-1)) = f(2) = ?

f(x) = 2x + 1
f(2) = 2.2 + 1
f(2) = 4 + 1
f(2) = 5

Logo, f(g(-1)) = 5