0580/41 Oct/Nov 2025, Question 23: Inverse proportion
Cambridge IGCSE Mathematics 0580 · Paper 41 (Extended) · Calculator · 2 marks
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The question, in short
y is inversely proportional to √(x + 1), and y = 3 when x = 8. Find y in terms of x.
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Solution · 2 marks
- 1y = k/√(x + 1)
- 23 = k/√(8 + 1) = k/3, so k = 9
- 3y = 9/√(x + 1)
Answer9/√(x + 1)
Stuck on a step? Read the free lesson: Inverse Proportion: y = k/x
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Also searched as: 0580/41/O/N/25 · 0580_w25_qp_41 · 0580 w25 41 · question 23.
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