hard · GMAT Quant
A financial sequence a_n is defined by a_1 = 3 and a_n+1 = a_n + 2n + 3 for n ≥ 1. A manager calculates the sum S = sum_n=1^20 dfrac1a_n a_n+1.
What is the value of S?
- dfrac2955313
- dfrac177010626
- dfrac118
- dfrac2965313
- dfrac16
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- Which of the following expressions must result in a positive value?
- Which property of arithmetic justifies that first step?
- Which of the following must also be an even integer?
- Which of the following inequalities correctly represents this range?
- Which of the following includes the number 0?
- How many unique meal combinations can a customer create?
- What is the probability that the lightbulb is functional?