Question: Please help on this complex analysis problem. 25. The next three calculations provide some insight into Cauchy's theorem, which we treat in the next chapter.

Please help on this complex analysis problem.

25. The next three calculations provide some insight into Cauchy's theorem, which we treat in the next chapter. (a) Evaluate the integrals [2" dz 7 for all integers R. Here 7 is any circle centered at the origin with the positive (counterclockwise) orientation. (b) Same question as before, but with 7 any circle not containing the origin. 4. Exercises 31 (c) Show that if |a|

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