body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

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Lesson Settings & Tools

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Concept

Index - Root

The index of a root is the number of times the resulting number should be multiplied with itself to become

a .

For example, in

38 = 2

the index is

3 .

If the result,

2,

is multiplied by itself

3

times, the product is

8 .

2 \cdot 2 \cdot 2 = 8

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