Additional Mathematics 0606 / Permutations and combinations / 4.044.04: Combination identity0606/12/M/J/26 — Question 13 · 4 marksMark as done · Save for later · Show official mark schemeShow that, for \(n\geqslant3\), \(\binom{n+2}{3}-\binom n3=n^2\).[4]▸ AnswerSee the official mark scheme below.▸ Official mark scheme
