Find the term independent of $x$ in the expansion of $\left(2x^2 + \frac{3}{x}\right)^9$.[3] Fin

Question

Find the term independent of $x$ in the expansion of $\left(2x^2 + \frac{3}{x}\right)^9$.[3] Find the first three terms of the expansion of $(2 - 3x)^5$ in ascending powers of $x$.[2] Hence, find the value of $n$ such that the coefficient of $x$ in the expansion of $ (2 - 3x)^5(1 - 3x)^n$ is $-720$[3]

Accepted Answer

(a) $489 \ 888$ (b)(i) $32 - 240x + 720x^2 \dots $ (b)(ii) $n = 5$

2024 GESS PRELIMS P1 Q5

2024 GESS PRELIMS P1 Q5