AQA GCSE Mathematics · 8300
Specification N7 · Paper 1, Paper 2, Paper 3
Revise: Indices and Roots CalculationsA fractional index combines a root with a power.
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GCSE Mathematics · key term
An index written as a fraction. Its denominator represents a root and its numerator represents a power.
Used by AQA, Edexcel and OCR
Specification N7 · Paper 1, Paper 2, Paper 3
Revise: Indices and Roots CalculationsA fractional index combines a root with a power.
Specification N7 · Paper 1, Paper 2, Paper 3
An index written as a fraction, such as or ; for positive bases it combines a root and a power.
For a fractional index, use the denominator as the root and the numerator as the power. Simplifying the root first often keeps the arithmetic manageable.
On Higher-tier questions with a negative fractional index, deal with the negative sign by taking the reciprocal, then apply the root and power.
For a fractional index on the Higher tier, use the denominator to choose the root and the numerator to choose the power.
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A negative fractional index adds the reciprocal step.
Specification 3.01a, 3.01b · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
An index that is a fraction and represents a root or a combination of a root and a power.
Revise: Index NotationA negative fractional index combines both ideas.