关于数学分析的计算题II
幂级数
$\bf计算：$$\lim \limits_{x \to \begin{array}{*{20}{c}}{{1^ - }}\end{array}} {\left( {1 - x} \right)^3}\sum\limits_{n = 1}^\infty {{n^2}{x^n}}$
$\bf计算：$
幂级数
$\bf计算：$$\lim \limits_{x \to \begin{array}{*{20}{c}}{{1^ - }}\end{array}} {\left( {1 - x} \right)^3}\sum\limits_{n = 1}^\infty {{n^2}{x^n}}$
$\bf计算：$
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