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13) By using cauchy's Integral formula, Evaluate 2-1-dz, where cis 12-il-2. Ans: - -259 { (2+1) (2-2)

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13) By using cauchy's Integral formula, Evaluate 2-1-dz, where cis 12-il-2. Ans: - -259 { (2+1) (2-2)

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