GRE Problem Solving Question 330

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Source: 150math

For each integer n > 1, let A(n) denote the sum of the integers from 1 to n. For example, A(100) = 1 + 2 + 3 + … + 100 = 5,050. What is the value of A(200)

  • A 10,100
  • B 15,050
  • C 15,150
  • D 20,100
  • E 21,100

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