Ononot — If A(x) = \sum{n=0}^{\infty} an x^n = \frac{1}{(1-x)^2}, wha

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Recurrence Relationshard

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If $A(x) = \sum_{n=0}^{\infty} a_n x^n = \frac{1}{(1-x)^2}$ , what is $a_n$ ?