Expand (81+54x)14\displaystyle (81 + 54x)^{\frac{1}{4}}(81+54x)41 in ascending powers of x x\,x up to and including the term in x3x^3x3. Give each coefficient as a simplified fraction.
Write down the set of values of x x\,x for which the expansion is valid.
Practise Edexcel A Level Maths 4.2 Expanding (a + bx)^n with exam-style questions for A Level Maths. 99 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.