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Let A}x :-1lt=xlt=1}a n df: Avec A such ...

Let `A}x :-1lt=xlt=1}a n df: Avec` A such that `f(x)=x|x|,` then `f` is (a) bijection (b) injective but not surjective Surjective but not injective (d) neither injective nor surjective

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