$\frac{ \sqrt{ {1}^{2} } }{ \sqrt{ 3 } }$
$1$ raised to any power equals $1$$\frac{ \sqrt{ 1 } }{ \sqrt{ 3 } }$
The quotient of roots with the same index is equal to the root of the quotient$\sqrt{ \frac{ 1 }{ 3 } }$
Use $\frac{ 1 }{ {a}^{n} }={a}^{-n}$ to transform the expression$\sqrt{ {3}^{-1} }$
Use $\sqrt[n]{{a}^{m}}={a}^{\frac{ m }{ n }}$ to transform the expression${3}^{-\frac{ 1 }{ 2 }}$