Ditentukan fungsi f yang didefinisikan f(x) = x-1/2x+1, x =/ -1/2, maka nilai f^-1(x) =

fungsi invers

f(x) =(x-1)/(2x+1)
y = (x-1)/(2x+1)
y(2x + 1)= x - 1
2xy + y  = x- 1
2xy - x = -y - 1
x(2y -1) = -y - 1
x = -(y+1)/(2y -1)

f⁻¹(x)= -(x+1)/(2x - 1)