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Give examples of two functions f : N → Z and g : Z → Z such that g o f is injective but g is not injective. (Hint: Consider f ( x ) = x and g ( x ) = ) |
| Answer» Give examples of two functions f : N → Z and g : Z → Z such that g o f is injective but g is not injective. (Hint: Consider f ( x ) = x and g ( x ) = ) | |