(i)[3]
Determine the first three terms in ascending powers of $x$ when $(2 + 3x)^6$ is expanded.
(ii)[2]
In the expansion of $(1 + ax)(2 + 3x)^6$, the coefficient of $x^2$ is zero. Determine the value of $a$.
Mathematics 9709 · AS & A Level · Series
Mathematics 9709 · AS & A Level · Series
Determine the first three terms in ascending powers of $x$ when $(2 + 3x)^6$ is expanded.
In the expansion of $(1 + ax)(2 + 3x)^6$, the coefficient of $x^2$ is zero. Determine the value of $a$.