For a quick look at key formulas, refer to the DSE M2 Notes .
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: These sites provide extensive archives of M2 Past Papers (2012-2025) along with marking schemes, which often serve as the best "notes" for understanding examiner expectations. For a quick look at key formulas, refer to the DSE M2 Notes
PDF, 45+ pages Target audience: HKDSE candidates, M2 self-learners, tutorial students 45+ pages Target audience: HKDSE candidates
Used when $y$ cannot be isolated. Differentiate both sides with respect to $x$, treating $y$ as a function of $x$ (use chain rule for terms with $y$).
Prove statements involving positive integers.