1/6 - (x - 2)/72 - 5/864 (x - 2)^2 + (47 (x - 2)^3)/10368 - (
269 (x - 2)^4)/124416 + (1319 (x - 2)^5)/1492992 + SeriesData[
x,2,{},0,6,1]
够了吧
收敛半径 1吧