Question

Determine whether each of the following functions is an injection, a surjection, both, or neither: (a)...

Determine whether each of the following functions is an injection, a surjection, both, or neither:

(a) f(n) = n^3 , where f : Z → Z

(b) f(n) = n − 1, where f : Z → Z

(c) f(n) = n^2 + 1, where f : Z → Z

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