invers fungsi, tolong ya

[tex]1. \: f(x) = 4x \\ y = 4x \\ x = \frac{y}{4} \\ invers \: \frac{x}{4} [/tex]
[tex]2.f(x) = 2x - 4 \\ y = 2x - 4 \\ - 2x = - y - 4 \\ 2x = y + 4 \\ x = \frac{y + 4}{2} \\ invers \: \frac{x + 4}{2} [/tex]
3. x^2-4x+2
y=x^2-4x+2
y-2=x^2-4×
ditambahkan masing-masing +4
y-2+4=x^2-4×+4
x^2-4×+4=y-2+4
(x-2)^2=y+2
x-2= //y+2
x=2+//y+2
ket: //= akar kurung
^= pangkat
(baru ditambahkan)

[tex]4.f(x) = \frac{2x + 1}{3} \\ y = \frac{2x + 1}{3} \\ 3y = 2x + 1 \\ 3y - 1 = 2x \\ x = \frac{3y - 1}{2} \\ invers \: \frac{3x - 1}{2} [/tex]
[tex]5.f(x) = \frac{2x - 1}{4x - 1} \\ invers \: pake \: cara \: \frac{ - dx + b}{cx - a} \\ \frac{1x - 1}{4x - 2} [/tex]
Maaf kalo salah, semoga membantu