**1.**Identify injective functions.**1.1**Classify functions based on the relation between input and output.**1.2**Deduce the injective function concept.**1.3**Determine functions that are injective or not, through their representation.**1.4**Represent injective functions in different ways.

**2.**Identify surjective functions.**2.1**Deduct the surjective function concept.**2.2**Determine what functions are surjective, through their representation.**2.3**Represent surjective functions in different ways.

**3.**Identify bijective functions.**3.1**Deduce the bijective function concept.**3.2**Determine functions that are bijective or not, based on their different representations.**3.3**Represent bijective functions in different ways.

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