幂级数
$f计算:$$lim limits_{x o egin{array}{*{20}{c}}{{1^ - }}end{array}} {left( {1 - x} ight)^3}sumlimits_{n = 1}^infty {{n^2}{x^n}}$
$f计算:$
幂级数
$f计算:$$lim limits_{x o egin{array}{*{20}{c}}{{1^ - }}end{array}} {left( {1 - x} ight)^3}sumlimits_{n = 1}^infty {{n^2}{x^n}}$
$f计算:$