Question:
If f(x) = y = ax-b/cx-a. Then prove that f(y) = x
Answer:
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)
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