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Multiple choice

The next term of the sequence 1, 2, 5, 26, ........ is.

  1. $677$
  2. $47$
  3. $50$
  4. $152$
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A Correct answer
Explanation

Observe the pattern: 1²+1=2, 2²+1=5, 5²+1=26. Each term is the previous term squared plus 1. Next term: 26² + 1 = 676 + 1 = 677.

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