On Tue, Apr 09, 2013 at 10:39:25PM +0200, Alan BRASLAU wrote:
> On Tue, 9 Apr 2013 21:25:16 +0200
> Xenia <yoraxe@googlemail.com> wrote:
> 
> > Oh, I didn't know that. For my feelings, all variables should have the
> > same size here (a,b and c).
> 
> In this case you should probably use:
> 
> a = \sqrt{b/c}

Unless \startformula \stopformula are set in \textstyle, fractions
should not be set that small, not in the default TeX settings.

Regards,
Khaled