Exercise 5.
Write out all functions \(f: \{1,2,3\} \to \{a,b\}\) (using two-line notation).
How many functions are there?
How many are injective?
How many are surjective?
How many are bijective?
Write out all functions \(f: \{1,2,3\} \to \{a,b\}\) (using two-line notation).
How many functions are there?
How many are injective?
How many are surjective?
How many are bijective?