| Exam Board | WJEC |
|---|---|
| Module | Unit 1 (Unit 1) |
| Year | 2022 |
| Session | June |
| Marks | 4 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Binomial Theorem (positive integer n) |
| Type | Expansion with algebraic manipulation then integrate |
| Difficulty | Moderate -0.3 This is a straightforward binomial expansion question requiring students to expand (2-3x)^5, divide by x^3, and identify the constant term. While it involves multiple steps and careful algebraic manipulation, it's a standard textbook exercise testing routine application of the binomial theorem with no novel insight required. The 4 marks reflect mechanical work rather than conceptual difficulty. |
| Spec | 1.04a Binomial expansion: (a+b)^n for positive integer n |
Find the term which is independent of $x$ in the expansion of $\frac{(2-3x)^5}{x^3}$. [4]
\hfill \mbox{\textit{WJEC Unit 1 2022 Q13 [4]}}