Question
Asked Mar 31, 2019
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Let z be a complex variable 

z=x+iy

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(a)
If C is the circle Izl = R, show that linn (2 + 4)(z2 +22+2)
(b) Use the result of (a) to deduce that if Ci is the circle lz-2
5, then
(2 +42 +2z+2)
Ci
(c)
Is the result in (b) true if Ci is the circle lz+1l 2? Explain.
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(a) If C is the circle Izl = R, show that linn (2 + 4)(z2 +22+2) (b) Use the result of (a) to deduce that if Ci is the circle lz-2 5, then (2 +42 +2z+2) Ci (c) Is the result in (b) true if Ci is the circle lz+1l 2? Explain.

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Expert Answer

Step 1

To examine the complex integral of the given rational function over different contours (circles) in the complex plane

Step 2

First determine all the poles of the integrand;  

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Step 3

(a) to show that the limit of the integral o...

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