Work out the first four terms, in ascending powers of xxx, in the binomial expansion of 1(1+x)2\displaystyle \frac{1}{(1+x)^2}(1+x)21
99 exam-style questions on OCR (MEI) A Level Maths 1.6.1 Binomial expansion for positive integer n. Each one has a worked solution and a mark scheme showing where the marks go.