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Class 9MathematicsSequences and ProgressionsSequencesMedium
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What is the sum of the first (4) terms of (40,36,32,\ldots)?

Answer and explanation

Correct answer: 136

The first four terms are 40, 36, 32, and 28 because each successive term decreases by 4. Therefore, \(40+36+32+28=136\). A result of 140 can arise from calculating the fourth term incorrectly. Exam tip: Write all the required terms before adding them.

Related tags

SequencesArithmetic ProgressionSum Of TermsDecreasing SequenceClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq
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10 more MCQs
  1. 1What is the next term of the sequence (2,4,6,8,\ldots)?
  2. 2What is the fifth term of the sequence (5,10,15,20,\ldots)?
  3. 3Which is the fourth term in the sequence (1,3,5,7,\ldots)?
  4. 4What will be the next term of (10,20,30,40,\ldots)?
  5. 5What is the next term of (12,11,10,9,\ldots)?
  6. 6What is the sixth term of (4,8,12,16,\ldots)?
  7. 7What is the third term in (7,14,21,28,\ldots)?
  8. 8What is the next term of (30,27,24,21,\ldots)?
  9. 9The sequence (9,18,27,36,\ldots) consists of multiples of which number?
  10. 10What will be the next term of (100,90,80,70,\ldots)?
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