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- 50ST. Show that Let C be a positively oriented curve given by z = 20 + Re 5) when n = +, +2,. 2ni when n = 0. (z- 20)-dz =
0 0
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Answer #1

(1) =S(z-z,) dz f) Let I = fll whete C i9 a boaitively aejented cusve given by Z= Zo +R and Diffel enticding Eqyabian (0) witphay 0 =-TT in-1) 0=-TT = R*if e-10+i° do = RM; S eho-to +io do = Ri J™ ehoda in-1)0+i0 ino-io O=-T O=-IT i we frave I= R(3) jiz-zoj~dz whey nz0 Again Cousider the Case when n ĭg an integes re, n = £1,±,£3, - .iftom (6), wehave I= RMF f eTno do(4) RM . we tave zp, I = (z-z0)dz = 0, wihen n=#ft?- when n=1, £3,- h-1 (z-zo) dz =0, otien n=tl,±2,- Hence : flom (7) ond (8

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