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Subjects
Class 9MathematicsSequences and ProgressionsGeometric ProgressionEasyLevel 58
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If a geometric progression has (a_2=15) and (r=3) what is (a_3)?

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Answer and explanation

Correct answer: (45)

The third term is (a_3=a_2\times r=15\times3=45). In exams multiply the previous term by the ratio to get the next term.

Related tags

SequencesProgressionsGeometric-ProgressionClass-9Easy

Frequently asked questions

What is the correct answer to this question?

(45)

Why is this the correct answer?

The third term is (a_3=a_2\times r=15\times3=45). In exams multiply the previous term by the ratio to get the next term.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Geometric Progression.

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10 more MCQs
  1. 1Which sequence is formed by a multiplication rule, not an addition rule?
  2. 2What is the 7th term of (4, 12, 36, 108, ...)?
  3. 3In the sequence \((81,27,9,3,\ldots)\), each term is \(\frac{1}{3}\) of the previous term. What is the sixth term?
  4. 4In the sequence 3, 6, 12, 24, ..., which is the first term greater than 500?
  5. 5In the sequence 5, 10, 20, 40, ..., which term is 5120?
  6. 6What is the common ratio in the sequence (2, 6, 18, 54, ...)?
  7. 7What will be the next term of the geometric progression (5,10,20,40,\ldots)?
  8. 8If a geometric progression has first term (4) and common ratio (2), what is the second term?
  9. 9What is the common ratio in the sequence (81,27,9,3,\ldots)?
  10. 10Is the sequence (3, 6, 12, 24, ...) a geometric progression?
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