4024/12 May/Jun 2022, Question 18: Inverse Functions
Cambridge O Level Mathematics 4024 · Paper 12 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
Given f(x) = 3x − 7, find the inverse function f⁻¹(x).
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Solution · 2 marks
- 1y = 3x − 7
- 2y + 7 = 3x
- 3x = (y + 7)/3
- 4f⁻¹(x) = (x + 7)/3
Answer(x + 7)/3
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