Exercise 16.
Let \(f:X \to Y\) be some function. Suppose \(3 \in Y\text{.}\) What can you say about \(f\inv(3)\) if you know,
\(f\) is injective? Explain.
\(f\) is surjective? Explain.
\(f\) is bijective? Explain.
Let \(f:X \to Y\) be some function. Suppose \(3 \in Y\text{.}\) What can you say about \(f\inv(3)\) if you know,
\(f\) is injective? Explain.
\(f\) is surjective? Explain.
\(f\) is bijective? Explain.