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Class 9MathematicsSequences and ProgressionsArithmetic ProgressionHardLevel 51
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What is the sum of the first (9) terms of the arithmetic progression (7,14,21,\ldots)?

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Answer and explanation

Correct answer: (315)

This is the sum of the first (9) multiples of (7), which is (315). In exams, identify sequences of multiples quickly.

Related tags

SequencesProgressionsArithmetic-ProgressionClass-9Hard

Frequently asked questions

What is the correct answer to this question?

(315)

Why is this the correct answer?

This is the sum of the first (9) multiples of (7), which is (315). In exams, identify sequences of multiples quickly.

Which subject and chapter does this question cover?

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

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10 more MCQs
  1. 1How can B={1,4,7,10,13} be written in set-builder form?
  2. 2What is the common difference in the sequence 11, 16, 21, 26, ...?
  3. 3In the sequence (5, 12, 19, 26, ...), how many terms are greater than 50 and less than 150?
  4. 4In the sequence 5, 10, 20, 40, ..., which term is 5120?
  5. 5In an arithmetic sequence, a_1=8 and a_4=20. What is its explicit rule?
  6. 6What is the common difference in the sequence (2,5,8,11,\ldots)?
  7. 7What will be the next term of the sequence (7,12,17,22,\ldots)?
  8. 8If an arithmetic progression has first term (4) and common difference (6), what is the second term?
  9. 9What is the common difference in the sequence (15,11,7,3,\ldots)?
  10. 10Is the sequence (3,6,9,12,\ldots) an arithmetic progression?
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