Check the injectivity and surjectivity of the following functions: (i) f : N → N given by f (x) = x2 (ii) f : Z → Z given by f(x) = x2 (iii) f : R → R given by f (x) = x2 (iv) f : N → N given by f (x) = x3 (v) f : Z → Z given by f(x) = x3

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| Exercise 1.2

Question 2

Check the injectivity and surjectivity of the following functions: (i) f : N \to N given by f (x) = x2 (ii) f : Z \to Z given by f(x) = x2 (iii) f : R \to R given by f (x) = x2 (iv) f : N \to N given by f (x) = x3 (v) f : Z \to Z given by f(x) = x3

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