Question

Função inversa de f(x) = 5x + 2 /x - 1 com x diferente 4

Answer 1

y = (5x + 2)/(x - 1)
y . (x - 1) = 5x + 2
yx - y = 5x + 2
xy - 5x = 2 + y
x(y - 5) = y + 2
x = (y + 2)/(y - 5)