8.7.1. Use partial fractions to evaluate the integral dr r(1-r2) that arises in Example 8.7.1, and show that ri = [1+ e-4" (rj² – 1)]¬1/2. Then confirm that P'(r*) = e-4T, as expected from Example 8.7.3.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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The value of the integral from Example 8.7.1 is   2 pi.  

I just need help in showing that the value of r1 is what is given.

8.7.1. Use partial fractions to evaluate the integral J r(1-r2)
dr
that arises in Example
8.7.1, and show that ri = [1+ e¬1" (ro² – 1)]¬1/2. Then confirm that P'(r*) = e-1", as
expected from Example 8.7.3.
Transcribed Image Text:8.7.1. Use partial fractions to evaluate the integral J r(1-r2) dr that arises in Example 8.7.1, and show that ri = [1+ e¬1" (ro² – 1)]¬1/2. Then confirm that P'(r*) = e-1", as expected from Example 8.7.3.
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