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Class 9MathematicsSequences and ProgressionsRecursive ruleMedium
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Which of the following recursive rules defines the sequence \(5,8,11,14,\ldots\)?

Answer and explanation

Correct answer: \(a_1=5,\ a_{n+1}=a_n+3\)

Each term is 3 more than the preceding term. With \(a_1=5\), \(a_2=a_1+3=8\) and then \(a_3=11\), so B is correct. In exams, check the difference between the first two terms.

Related tags

Recursive RuleSequencesProgressionsArithmetic SequenceMathematics Class 9Sequences And ProgressionsMathematicsClass 9 Mcq
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10 more MCQs
  1. 1If a₁ = 8, a₂ = 13, and each next term is the sum of the previous two terms, what is a₆?
  2. 2In the sequence \((2,3,5,8,13,\ldots)\), each term is the sum of the previous two terms. What is the eighth term?
  3. 3In the sequence \((1,2,4,7,11,\ldots)\), the added numbers are \((1,2,3,4,\ldots)\). What is the eighth term?
  4. 4In the sequence (15, 12, 7, 0, -9, ...), the differences are (-3, -5, -7, -9, ...). What will be the next term?
  5. 5In the sequence (7, 15, 31, 63, 127, ...), each next term is obtained by doubling the previous term and adding 1. What will be the next term?
  6. 6In the sequence (2, 3, 5, 9, 17, 33, ...), each next term is obtained by doubling the previous term and subtracting 1. What will be the next term?
  7. 7If (a_1=2) and (a_{n+1}=a_n+3), what is (a_4)?
  8. 8If (a_1=10) and (a_{n+1}=a_n-2), what is (a_5)?
  9. 9If (a_1=3) and (a_{n+1}=2a_n), what is the value of (a_4)?
  10. 10If \(a_1=64\) and \(a_{n+1}=\frac{a_n}{2}\), what is \(a_4\)?
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