Question

How to do that? (Indices) a{1}{2} " alt=" \frac{1}{2} " align="absmiddle" class="latex-formula">(a+$\frac{1}{a}$)

Answer 1

$\bf a\cdot \cfrac{1}{2}\left(a+\cfrac{1}{a} \right)\impliedby \textit{let's distribute first} \\\\\\ \cfrac{a}{2}\left(a+\cfrac{1}{a} \right)\implies \cfrac{a}{2}\cdot a+\cfrac{\underline{a}}{2}\cdot \cfrac{1}{\underline{a}}\implies \cfrac{a^2}{2}+\cfrac{1}{2}\implies \cfrac{a^2+1}{2}$