"First (n+5)"pos .integers involves 5 more integers than "first n"pos . integers . Since the sum of these 5 is 240=46+47+48+49+50, n=45, and 45 is itself the sum of the first 9 positive integers . 对于某些数n,前n个正整数
of the first 200 positive integers is 1275. What is the sum of the last 50 of the first 200 positive integers( ). A. 6275B. 6600C. 8375D. 8775相关知识点: 试题来源: 解析 D (151+152+153+⋯+200) =(150+1+150+2+150+3+⋯+150+50) =50×150+(1+2+3+⋯+50) =7500+1275...
The sum of the first k positive integers is equal to frack(k+1)2frack(k+1)2 . What is the sum of the integers from n to m, inclusive, where 0<n<m0<n<m ? 选项: A、 m(m+1)2−(n+1)(n+2)2m(m+1)2−(n+1)(n+2)2...
回收铝; 玻璃; 塑料,纸,报纸,杂志; 电话簿和皱纸板。 [translate] aThen, use your result to find a formula for the sum of the first n positive integers. 然后,使用您的结果发现一个惯例为第一个n正面整数的总和。 [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 ...
1What is the greatest commom divisor of positive integers m and n ?() (1)m is a prime number. (2)m and n are consecutive integers. A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条件(1)...
The sum of the first 50 positive integers is 1,275. What is the sum of the integers from 51 to 100, inclusive? A. 2525 B. 2550 C. 325 D. 3775 E. 5050 相关知识点: 试题来源: 解析 D 正确答案:D 解析:前50个正整数的和是1275,问从51至100的整数(包括51和100)的和是多少?解:本题...
一道Gmat数学题!For any positive integer n,the sum of the first n positive integers equals n(n+1)/2.what is the sum of all the even integers between 99 and 301?
Answer to: Compute the sum of the first 50 positive integers that are exactly divisible by 5. By signing up, you'll get thousands of step-by-step...
For any positive integer n , the sume of the first n positive integers equal [n/(n+1)]/2.What is the sum of all the even integers between 99and 301? A10100 B 20200 C 22650 D 40200 E 45150 解答: 点赞0 阅读3931 解答: sysadmin老师 ...
The sum of the first 50 positive integers is1,275.What is the sum of the integers from 51 to 100,inclusive A. 2,525 B. 2,550C. 3,25D. 3,775 E. 5,050 相关知识点: 试题来源: 解析 D 前50个正整数的和是1275,问从引至100的整数(包括51和100)的和是多少 为简化计算.考生可把...