# MathML Demo: <msqrt>, <mroot> - radicals

MathML has two root objects, an `<msqrt>` $\sqrt{x}$ and an `<mroot>` $\sqrt[3]{x}$. These are pretty simple. About all you can do with them is see how the rendering stretches them in various ways: horizontally $\sqrt{{\mathrm{sin}}x{\mathrm{cos}}y}$, vertically $\sqrt{\frac{\frac{1}{2}}{\frac{3}{4}}}$ and $\sqrt{{{\mathrm{det}}\left(\begin{array}{cc}1& 2\\ 3& 4\end{array}\right)}^{2}}$, as well as $\sqrt[xyzw]{2}$, $\sqrt[\frac{\frac{1}{2}}{\frac{3}{4}}]{2}$, and $\sqrt[⌈{det}\left(\begin{array}{cc}1& 2\\ 3& 4\end{array}\right)⌉]{2}$.

## displays

MathML has two root objects, an `<msqrt>` $x$ and an `<mroot>` $x 3$These are pretty simple. About all you can do with them is see how the rendering stretches them in various ways: horizontally $sin ⁡ x ⁢ cos ⁡ y$vertically $1 2 3 4$ and $det ( 1 2 3 4 ) 2$ as well as $2 x ⁢ y ⁢ z ⁢ w$$2 1 2 3 4$and $2 ⌈ det ( 1 2 3 4 ) ⌉$

The formula of Binet shows how the n-th term in the Fibonacci series can be expressed using roots $f n = 1 5 [ ( 1 + 5 2 ) n - ( 1 - 5 2 ) n ]$

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