Question

Dado f(2x - 3) = 4x + 1, calcular f(5).

Answer 1

f(2x-3) = 4x+1

f(2x-3) = f(5)

2x - 3 = 5
2x = 5 + 3
2x = 8
x = 8/2
x = 4

agora fazemos f(5) , tal que o valor de x = 4

f(5) = 4x + 1
f(5) = 4.4 + 1
f(5) = 16 + 1
f(5) = 17