Simplify powerseries?

[karl]

Hi all,
when I write 
"makefact(powerseries((1-x)^(-n),x,0));"
then I get this
                                 inf
                                 ====          i1  i1
                                 \        (- 1)   x
                        (1 - n)!  >     ---------------
                                 /      i1! (- n - i1)!
                                 ====
                                 i1 = 0
(%o1)                   -------------------------------
                                     1 - n

I tried several things so that the (1-n) in the denominator gets cancelled,
but to no avail.
What to do?
Thanks
Karl



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