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<h1 id="function-nthroot">Function nthRoot <a href="#function-nthroot" title="Permalink">#</a></h1>

Calculate the nth root of a value.
The principal nth root of a positive real number A, is the positive real
solution of the equation

    x^root = A

For matrices, the function is evaluated element wise.


<h2 id="syntax">Syntax <a href="#syntax" title="Permalink">#</a></h2>

```js
math.nthRoot(a)
math.nthRoot(a, root)
```

<h3 id="parameters">Parameters <a href="#parameters" title="Permalink">#</a></h3>

Parameter | Type | Description
--------- | ---- | -----------
`a` | number &#124; BigNumber &#124; Array &#124; Matrix &#124; Complex |  Value for which to calculate the nth root
`root` | number &#124; BigNumber | The root. Default value: 2.

<h3 id="returns">Returns <a href="#returns" title="Permalink">#</a></h3>

Type | Description
---- | -----------
number &#124; Complex &#124; Array &#124; Matrix | Returns the nth root of `a`


<h2 id="examples">Examples <a href="#examples" title="Permalink">#</a></h2>

```js
math.nthRoot(9, 2)    // returns 3, as 3^2 == 9
math.sqrt(9)          // returns 3, as 3^2 == 9
math.nthRoot(64, 3)   // returns 4, as 4^3 == 64
```


<h2 id="see-also">See also <a href="#see-also" title="Permalink">#</a></h2>

[sqrt](sqrt.html),
[pow](pow.html)