Question 986521
{{{sum((1/3)^n,n=-2,infinity)=9+3+1+sum((1/3)^n,n=1,infinity)}}}
{{{sum((1/3)^n,n=-2,infinity)=13+1/(3-1)}}}
{{{sum((1/3)^n,n=-2,infinity)=13+1/2}}}
{{{sum((1/3)^n,n=-2,infinity)=27/2}}}