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Consider the set A={1,2,3,4,5}, and B={1...

Consider the set `A={1,2,3,4,5}`, and `B={1,4,9,16,25}` and a function `f:AtoB` defined by `f(1)=1`, `f(2)=4`, `f(3)=9`, `f(4)=16 ` and `f(5)=25`.
Show that `f` is one-to-one.

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