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Sequence and Series - Arithmetic Progression

Sequence and Series - Arithmetic Progression

In an arithmetic sequence, \(u_1 = 2\) and \(u_3 = 8\).

  1. Find \(d\).
  2. Find \(u_{20}\).
  3. Find \(S_{20}\).

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Answer:(a) \(d=3\) (b) \(u_{20}=59\) (c) \(S_{20}=610\)

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