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The residue of text f left( text z right) = frac...

This question belongs to Engineering Maths Complex Variable
Complex Variable
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The residue of $${\text{f}}\left( {\text{z}} \right) = \frac{{{{\text{z}}^3}}}{{{{\left( {{\text{z}} - 1} \right)}^4}\left( {{\text{z}} - 2} \right)\left( {{\text{z}} - 3} \right)}}$$      at z = 3 is

Answer & Solution
Correct Answer: Option D
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