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Ex. 4.19. Use contour integration to evaluate the following real integrals dar da (a) (b) r22x5 (x21)2 da da (c) (d) (221)(a2

ex4.19

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l4.1. da (4t(2) intyk Con Aider th WAere (Ht(t Clozed contour taken ound tonfiA ting of thurper hakf of ange eirele 21 R andLim Citi) Ci) 2. -tH L-1) ond YRAdrue -i) pim N-t/ (n-2) (nt2)(4,2) (2ir(ritri) . Jum af reiduen within thu 122 nau9. by cancTherefore (A -- (2) m From d (4t CR Mence by making becomen ation dn (-a) Paygnd t Cen ider C Whene the comtour a Large emi- civele of radiun tetern axin from R With the ak Ву cauchyn reridue theore, dn din ) Taing 2iRt (2) gives dx to OYe out of which fo ?=군 기0 A uQ ien 1 opao Thenatore i inside residue ak (>, Pl2 - (27 H오re /

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ex4.19 Ex. 4.19. Use contour integration to evaluate the following real integrals dar da (a) (b) r22x5 (x21)2 da da (c)...
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