Convergence of Series 

Wm C Bauldry 

Dept of Mathematical Sciences
Appalachian State University
 

Series of Real Numbers 

A series is generated by summing a sequence of terms. The partial sums S[n] of the series are given by S[n] = sum(a[i], i = n[0] .. n). We say the series converges to a limit when the sequence of partial sums converges. Since it's very difficult to tell by inspection when a series converges, we select from a set of convergence tests that increase in power, but also increase in the effort needed for their computation. We must interpret the results of any test to determine what it tells us about the series in question. 

 

The Series Test Calculator let's us enter the general term a[n], the beginning index n[0], and then have Maple perform the computations by clicking the Do the Tests button. After interpreting the results, then click the Evaluate button to see Maple's answer with a graph of the partial sums S[n] and the terms a[n]. Compare your results with Maple's. 

 

Try the Series Test Calculator with series that you know; for example, try the calculator on series with terms given by a[n] = `/`(1, `*`(n)) and a[n] = Typesetting:-delayDotProduct(`/`(1, `*`(`^`(n, 2))), Now), factorial(explore) 

 

 

The Series Test Calculator 

The Series Calculator 

 

EnterEmbedded component and n0 :=Embedded component. Now Do the Tests 

D'Alembert's Ratio Test:
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Cauchy's Root Test:
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Raabe's Test:
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The Integral Test:
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Maple's Results 

The Series:Evaluate   

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Clear All 

 

References