0580/21 May/Jun 2025, Question 19: Fractional Indices
Cambridge IGCSE Mathematics 0580 · Paper 21 (Extended) · Non-calculator · 2 marks
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The question, in short
Work out the value of 27 raised to the power −2/3.
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Solution · 2 marks
- 127^(1/3) = 3
- 227^(2/3) = 3² = 9
- 327^(−2/3) = 1/9
Answer1/9
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