2026 ZHSS P1 Q7

2026 ZHSS P1 Q7

Secondary 4
7 marks
  1. Find the first 4 terms in the expansion of \(\left(2-\dfrac{ax}{4}\right)^5\) in ascending powers of \(x\), simplifying each term.[4]
  2. Given that there is no term in \(x\) in the expansion of \((5-2x)\left(2-\dfrac{ax}{4}\right)^5\), find the value of the constant \(a\).[3]

Solution:

Solution locked

Sign in to view the step-by-step solution

Similar questions are unavailable for this question.
Answer:(a) \(32-20ax+5a^2x^2-\dfrac58a^3x^3\) (b) \(a=-\dfrac{16}{25}\)

Need help? Join our JC Math tuition classes.

Learn more