2. 外语
  3. The sum of the first 100 positive integers is 5,050. What is the sum of the first 200 positive integers?

The sum of the first 100 positive integers is 5,050. What is the sum of the first 200 positive integers?

admin2022-10-18  9
问题 The sum of the first 100 positive integers is 5,050. What is the sum of the first 200 positive integers?
选项 A、10,100
B、10,200
C、15,050
D、20,050
E、20,100
答案E
解析 The sum of the first n positive integers is given by , so the sum of the first 200 positive integers is=20,100.
Alternatively, letting represent the sum of the first 100 positive integers, it is given that  = 5,050. Using this notation, = 2(5,050)+ 10,000 = 10,100 + 10,000 = 20,100. The correct answer is E.
转载请注明原文地址:https://jikaoti.com/ti/yzzYFFFM
本试题收录于： GMAT QUANTITATIVE题库GMAT分类
0

GMAT QUANTITATIVE

GMAT

相关试题推荐
随机试题
最新回复(0)