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Class 9MathematicsSequences and ProgressionsSum of first n natural numbersExpert
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What is the value of (S_{102}+S_{103}-S_{101})?

Answer and explanation

Correct answer: (5554)

(S_{102}=5253), (S_{103}=5356), and (S_{101}=5151), so the value is (5458). Subtract carefully with nearby indices.

Related tags

MathSequencesNatural-NumbersSumSum Of First N Natural NumbersSequences And ProgressionsMathematicsClass 9 Mcq
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10 more MCQs
  1. 1Let A = {x : x is a natural number and x < 4}. What is A?
  2. 2If (a=10) and (d=2), what will be the sum of the first (6) terms?
  3. 3If a = 7 and d = 3, what is the sum of the first 6 terms?
  4. 4What is the sum of the first 6 terms of the arithmetic progression (15, 21, 27, 33, ...)?
  5. 5What is the sum of the first (10) natural numbers?
  6. 6Find the sum of the first (20) natural numbers.
  7. 7If \(S_n=\frac{n(n+1)}{2}\), what is \(S_{15}\)?
  8. 8What is the value of (1+2+3+\cdots+25)?
  9. 9Which is the sum of the first (30) natural numbers?
  10. 10How much is the sum of the first (12) natural numbers?
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