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\frac{1+1+1}{\sqrt{5}}
Calculate the square root of 1 and get 1.
\frac{2+1}{\sqrt{5}}
Add 1 and 1 to get 2.
\frac{3}{\sqrt{5}}
Add 2 and 1 to get 3.
\frac{3\sqrt{5}}{\left(\sqrt{5}\right)^{2}}
Rationalize the denominator of \frac{3}{\sqrt{5}} by multiplying numerator and denominator by \sqrt{5}.
\frac{3\sqrt{5}}{5}
The square of \sqrt{5} is 5.