4024/11 Oct/Nov 2020, Question 5: Proportion to Powers of x
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Given y is directly proportional to x cubed, and y = 4 when x = 2, find y when x = 3.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1y = kx³: 4 = k × 2³, so k = 4/8 = 1/2
- 2y = 1/2 × 3³ = 27/2
- 3= 13 1/2
Answer13 1/2
Stuck on a step? Read the free lesson: Proportion to Powers of x
Practise more proportion to powers of x questions
Real 4024 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on proportion to powers of x
Also searched as: 4024/11/O/N/20 · 4024_w20_qp_11 · 4024 w20 11 · question 5.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.