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Class 11

Sequences and Arithmetic Progressions, Quiz

Five questions on sequences and arithmetic progressions. Pick one answer for each.

5 questions, one mark each. 3 to pass. Suggested time: 10 minutes. Your answers are not recorded.

  1. A sequence has an=2n2−1a_n = 2n^2 - 1. Find a4a_4.
  2. A sequence has a1=2a_1 = 2 and an+1=2an−1a_{n+1} = 2a_n - 1. Find a4a_4.
  3. Find the 1515th term of the AP 4,9,14,…4, 9, 14, \ldots
  4. Find the sum of the first 2020 terms of the AP 3,7,11,…3, 7, 11, \ldots
  5. Which term of the AP 7,11,15,…7, 11, 15, \ldots is 9999?
Unanswered questions are marked wrong.

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