How to prove f(f-1 x ))= x?
How to prove f(f-1 x ))= x? Here is the proof: Let x is an arbitrary point from B. As the function f is bijective, it follows that there is a unique point y in A such that f(y)=x. Therefore f(f−1(x))=f(y)=x. To determine if a function is invertible, we need to decide if each input […]
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