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Concrete mathematics : a foundation for computer science

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462 ASYMPTOTICS<br />

9.6 FINAL SUM:MATIONS<br />

Now comes the summing up, as we prepare to conclude this book.<br />

We will apply Euler’s summation <strong>for</strong>mula to some interesting and important<br />

examples.<br />

Summation 1: This one jis too easy.<br />

But first we will consider an interesting unimportant example, namely<br />

a sum that we already know how to do. Let’s see what Euler’s summation<br />

<strong>for</strong>mula tells us if we apply i.t to the telescoping sum<br />

sn= EL=:<br />

l

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