Question: 3. Determine whether the following functions are injective, surjective, bijective. Justify your answers. a. Let f : R* - R+ be defined by f(x) =

3. Determine whether the following functions are injective, surjective, bijective. Justify your answers. a. Let f : R* - R+ be defined by f(x) = x2. b. Let f : N - N be defined by f (n) = n2

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