Jika f(x) = 2x - 5 / 5x + 2.Tentukan f-1 (5).

cara cepat cari f^-1 (x)
f^-1 (x) = -dx + b / cx -a

semoga membantu

2x - 5 / 5x + 2 = y
2x - 5 = 5xy + 2
2x - 5xy = 2 + 5
x (2 - 5y) = 7
x = 7 / 2 - 5y
f⁻¹(x) = 7 / 2 - 5x
f⁻¹(5) = 7 / 2 - 5(5)
f⁻¹(x) = 7 / 2 - 25
f⁻¹(x) = 7 / -23
f⁻¹(x) = - 7/23