Find the first three terms, in ascending powers of xxx, of the binomial expansion of
19+x \frac{1}{\sqrt{9 + x}} 9+x1giving each coefficient in its simplest form.
408 exam-style questions on Edexcel A Level Maths Binomial Expansion, covering 4.1 Expanding (1 + x)^n, 4.2 Expanding (a + bx)^n, and 4.3 Using Partial Fractions. Each one has a worked solution and a mark scheme showing where the marks go.