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The square root of say 5 can be written as \sqrt{5} . Using fractional powers it can also be written as 5^{\frac{1}{2} } . The cube root of 7 can be written as 7^{\frac{1}{3} } .

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## Glossary

### cube root

of a number n, that value that when cubed equals n

### square root

of a number n, that value that when squared equals n

### union

The union of two sets A and B is the set containing all the elements of A and B.

Full Glossary List