Argue geometrically by talking about over and underestimates of the unknown value of the infinite series. As the terms of the series add area to the visualized object, argue whether or not it is possible to give both over and underestimates of the total area being formed by series, and whether or not it is possible to always reduce the error between the over and underestimates of the area being constructed. If it converges, give the area to which the series will converge.