Author note — to cover (Higher)

Higher only, N7's braced clause. The index 1/n as the nth root, justified by raising a power to a power; evaluating 25 to the 1/2, 27 to the 1/3, 32 to the 1/5 without a calculator. General m/n indices follow next; Foundation stops at integer indices. (N7)

Introduction

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Practice and continue

Practice

Unit fractional indices

The index one over n as the nth root, derived from raising a power to a power.

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Fractional indices

The index m over n as a root and a power, and which one to take first.