For any positive integer n,the sum of the first n positive i

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?
A.x0510,100
B.x0520,200
C.x0522,650
D.x0540,200
E.x0545,150
C.x0522,650

wazzy 1年前已收到1个回答举报

超级树獭幼苗

共回答了17个问题采纳率：88.2% 举报

求翻译!
1~99的和为99*（99+1）/2=4950
1~301的和为301*（301+1）/2=45451
100~301的和为45451-4950=40501
100~301 设偶数和为x 则奇数和为x+101 （共202个数,奇数和偶数各101个奇数和比偶数和大101）
x+(x+101)=40501
x=20200
即偶数和为20200
貌似你的答案有问题饿……

1年前

可能相似的问题

一道英文数学题There is a positive integer,B,such that 2B is a perfe

1年前3个回答
When 53 is divided by a positive integer n ,the remainder is

1年前1个回答
GMAT数学Which of the following is the lowest positive integer

1年前3个回答
GMAT数学一道If n is a positive integer,what is the value of n (1

1年前2个回答
请教一条GMAT的余数问题When positive integer x is divided by positive

1年前1个回答
If y is the smallest positive integer such that 3,150 multip

1年前2个回答
If n is a positive integer and 2n+2n+1=k,what is 2n+2 in ter

1年前2个回答
If n is a positive integer，and

1年前5个回答
GMAT 数学题if n is a positive integer and n^2 is divisible by 7

1年前3个回答
1：Prove that if x is a positive integer that is not divisibl

1年前1个回答
真题When the positive integer S is divided by 12,the remainder

1年前1个回答
If n is a positive integer，and

1年前1个回答
Suppose n is a positive integer and T is a linear operator o

1年前1个回答
Prime FactorDescription Give you a positive integer,please s

1年前1个回答
If n is a positive integer，and

1年前2个回答
Gmat数学翻译句子中“the first”意思[ For any positive integer n,the su

1年前3个回答
问一道GMAT的DS题if n is a positive integer,what is the tens digit

1年前2个回答
英语翻译Is the positive integer n equal to the square of an inte

1年前2个回答
VB练习题,,请高手帮我完成 a=(2n+1)!,n is an positive integer

1年前1个回答

你能帮帮他们吗

精彩回答