Give examples of two functions f: N → Z and g: z → z such that g o f is injective but g is not injective.

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answered Jan 12, 2018 by mdsamim (213,225 points)
edited Mar 6, 2018 by Vikash Kumar

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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.

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