Question

if y=f(x)=ax-b/bx-a prove that f(y)=x

Answer 1

Given f(x) = y =(ax - b)/(cx - a)

=> y*(cx - a) = ax - b

=> cxy-ay = ax - b

=>cxy- ax = ay - b

=> x*(cy - a) = ay - b

=> x =  (ay - b)/(cy - a)

=>f(y) = x = (ay - b)/(cy - a)

Answer 2

Answer:

Step-by-step explanation:

Y=f(x) =ax-b/bx-a

X=ay-b/by-a

ay-b/by-a=f(y)

X=f(y)