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GCSE Maths > Algebra - Indices

3 ('3 to the power of 3') and 5 (5 'to the power' of 2) are example of numbers in index form.
3 = 333
2 = 2
2 = 22
2 = 222
etc...

The and are known as indices. Indices are useful (for example they allow us to represent numbers in standard form) and have a number of properties. These properties only hold, however, when the same number is being raised to a certain power. For example, we cannot easily work out what 25 is, whereas we can simplify 33 .

Copyright Matthew Pinkney 2003

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