Given function f, prove that f(x)=4-2x is a one -to-one function.

A one-to-one function is a function for which every element of the range of the function corresponds to exactly one element of the domain.

f(x) = 4 - 2x

We have to show that

if f(x1)=f(x2), then x1=x2

Thank you.

Happy to help :)

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