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Prove that the function , defined by is a bijective function.
Prove that the function $f: \mathbb{Z} \to \mathbb{Z}$, defined by $f(x) = x - 5$ is a bijective function.
Given: $f: \mathbb{Z} \to \mathbb{Z}$, defined by $f(x) = x - 5$
To show: $f$ is a bijective function.
Answer
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From ISC 2026 Improvement Mathematics Paper 1, question 2(i).