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Kloo

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Kloo

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pasmith

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\left(\sum_{n=0}^\infty a_nx^n \right)\left(\sum_{n=0}^\infty b_nx^n \right) &=

\sum_{n=0}^\infty \sum_{m=0}^\infty a_n b_m x^{n+m} \\

&=\sum_{k=0}^\infty \left(\sum_{n=0}^n a_n b_{k-n}\right) x^k. \end{split}[/tex]

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