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Official PYQ · 2025Set 1 · Q2Complex AnalysisMCQ1 mark

GATE EC 2025 Set 1 Q2 — Complex Analysis

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Consider the following series:

  1. ∑n=1∞1n\sum_{n=1}^{\infty} \frac{1}{\sqrt{n}}
  2. ∑n=1∞1n(n+1)\sum_{n=1}^{\infty} \frac{1}{n(n+1)}
  3. ∑n=1∞1n!\sum_{n=1}^{\infty} \frac{1}{n!}

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Answer: B

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