Take the tour ×  For pedantic reasons I want to display an
infinite sum of fractions in fractional form (i.e. as 1/x not as
x^(-1)) with an ellipsis at the end of the expression. I have
tried a number of ways and none seem to give me what I want. For
example  HoldForm[1/#^s] & /@ Table[3^n, {n, 1, 4}] {1, %,
\[Ellipsis]} // Flatten (Plus @@ %) // TraditionalForm  gives me
output ordered as: fractional forms + ... + 1, while
StandardForm gave me 1 + ... + the fractional forms. Other ways
I tried led to similar forms - none of them yield the book form
of 1 + fractions + ... that I want.  I am probably missing
something simple here - Thank you for any help  share|improve
this question add comment  1 Answer  One way to display the sum
in the order you want is to use Row:  {1, %, ...} // Flatten
Row[%, "+"] // TraditionalForm
$1+\frac{1}{3^s}+\frac{1}{9^s}+\frac{1}{27^s}+\frac{1}
{81^s}+\ldots$  The reason why the order isn't maintained in the
original version is that Plus has attribute Orderless which
means that