Question

Se f(x)=5x+7e g(x)=3x +5 , calcule o valor de:

a) f(g(3))
b) g(f(2))

Answer 1

Resposta:

a) 77

b) 56

Explicação passo a passo:

f(x) = 5x + 7

g(x) = 3x + 5

a) f(g(3)) = ?

g(x) = 3x + 5

g(3) = 3(3) + 5

g(3) = 9 + 5

g(3) = 14

f(g(3)) = f(14)

f(x) = 5x + 7

f(14) = 5(14) + 7

f(14) = 70 + 7

f(14) = 77

b) g(f(2)) = ?

f(x) = 5x + 7

f(2) = 5(2) + 7

f(2) = 10 + 7

f(2) = 17

g(f(2)) = g(17)

g(x) = 3x + 5

g(17) = 3(17) + 5

g(17) = 51 + 5

g(17) = 56