MathematicsFind the sum of the first 100 positive integers.

Find the sum of the first 100 positive integers.


  1. A
    1010
  2. B
    2020
  3. C
    5050
  4. D
    10050 

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    Solution:

    AP: 1, 2, 3,..., 100
    a = 1, d = 1, n = 100 = l
    Sn=n2a+l=10021+100=50×101=5050.
    The correct answer is Option (3).
     
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