Berapakah hasil dari pertanyaan di atas​

Penjelasan dengan langkah-langkah:

f (x) = 1/(x + 2)

y = 1/(x + 2)

(x + 2) . y = 1

xy + 2y = 1

xy = 1 – 2y

x = (1 – 2y)/y

f⁻¹ (x) = (1 – 2x)/x

f⁻¹ (x) = -4

(1 – 2x)/x = -4

1 – 2x = -4x

-2x + 4x = -1

2x = -1

x = -1/2

Jawabannya C