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April 1st, 2019, 09:05 PM   #1
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generating functions

How can I continue this problem.

my aim is to write a closed form.

( the first line is the original question given, the rest is I have written )
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April 1st, 2019, 11:51 PM   #2
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It's the generating function of -ln(1 - x). This is usually proved by use of calculus.
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