1/2a+1/3a+1/6a при а =2

[latex] frac{1}{2a} + frac{1}{3a} + frac{1}{6a} \ old{a=2} \ Rightarrow frac{1}{2 cdot 2} + frac{1}{3 cdot 2} + frac{1}{6 cdot 2} = frac{1}{4} + frac{1}{6} + frac{1}{12} =oxed{0,5}.[/latex]