Question 1069916
<pre>
Just those five terms?  Or did you leave off +... and
intend it to be an infinite series?  Here is the sum
of just these 5 terms:

{{{1 + 1/3 + 1/(3*9) + 1/(3*9*27) + 1/(3*9*27*81)}}}{{{""=""}}}

{{{1 + 1^""/3^"" + 1^""/(3*3^2) + 1^""/(3*3^2*3^3) + 1^""/(3*3^2*3^3*3^4)}}}{{{""=""}}}

{{{1 + 1^""/3^"" + 1^""/(3^3) + 1^""/(3^6) + 1^""/(3^10)}}}{{{""=""}}}

{{{3^10/3^10 + 3^9/3^10 + 3^7/(3^10) + 3^4/(3^10) + 1^""/(3^10)}}}{{{""=""}}}

{{{59049/3^10 + 19683/3^10 + 2187/(3^10) + 81/(3^10) + 1^""/(3^10)}}}{{{""=""}}}

{{{(59049+19683+2187+81+1)/(3^10)}}}{{{""=""}}}

{{{81001/(3^10)}}}{{{""=""}}}

{{{81001/59049}}}{{{""=""}}}

{{{"1.3717590475706616538806753713018001998340361394773831902318413520974106250740910091618825043607851106707988280919..."}}}

Edwin</pre>