Find the first three terms, in ascending powers of xxx, of the binomial expansion of (3+kx)5(3 + kx)^5(3+kx)5 where kkk is a constant. Give each term in simplest form.
Given that in the expansion of (2−x)(3+kx)5(2 - x)(3 + kx)^5(2−x)(3+kx)5 the coefficient of x2x^2x2 is 135135135,
find the possible values of kkk.
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.