- #1

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[tex]\sum((nx)^(2n))[/tex]

(reads: the series from n=1 to infinity of nx^(2n))

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- #1

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- 0

[tex]\sum((nx)^(2n))[/tex]

(reads: the series from n=1 to infinity of nx^(2n))

- #2

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Try to first find an equation for sum n*x^n = x*sum n*x^(n-1) using integration/differentiation.

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