GraphingCalculator 3.5;
Window 46 376 758 1016;
PaneDivider 221;
Slider 0 20;
SliderSteps 20;
SliderControlValue 0;
2D.BottomLeft -2.609375 -3.375;
Expr 1/[1+x];
Color 2;
Expr sum([-x]^k,k=0,n);