Find the first three terms, in ascending powers of xxx, in the expansion of
(3+kx)6 (3 + kx)^6 (3+kx)6where kkk is a positive constant.
Hence, given that the coefficient of x2x^2x2 is six times the coefficient of xxx, find the value of kkk.
108 exam-style questions on WJEC A Level Maths 1.4.1 Sequences and Series - The Binomial Theorem. Each one has a worked solution and a mark scheme showing where the marks go.