$$\frac { 1 } { \sqrt { 11 } \cdot 2 }$$
$\frac{\sqrt{11}}{22}\approx 0.150755672$
$$\frac{\sqrt{11}}{2\left(\sqrt{11}\right)^{2}}$$
$$\frac{\sqrt{11}}{2\times 11}$$
$$\frac{\sqrt{11}}{22}$$
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