Question

F(2x+5) = 10x + 25
f(x) = ?

Answer 1

F(x) = (10x + 25) o (2x + 5)⁻¹ ⇒ y = 2x + 5    x = y/2 - 5/2   g⁻¹(x) = x/2 - 5/2 
F(x) = (10x + 25) o (x/2 - 5/2)
x di 10x + 25 digantikan dengan x/2 - 5/2

F(x) = 10(x/2 - 5/2) + 25
F(x) = 5x - 25 + 25
F(x) = 5x