(1+2)+(2+3)+···+(2007+2008)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 05:14:20
(1+2)+(2+3)+···+(2007+2008)(1+2)+(2+3)+···+(2007+2008)(1+2)+(2+3)+···+(2007+2008)=1+2+3.+2008+2+3+4+
(1+2)+(2+3)+···+(2007+2008)
(1+2)+(2+3)+···+(2007+2008)
(1+2)+(2+3)+···+(2007+2008)
=1+2+3.+2008+2+3+4+.+2007={(1+2008)*2008/2}*2-2008=4032046
根据1+2+3+4+······+n=n(n+1)/2 计算2+4+6+····+200
1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+······+1/(1+2+3+······+200)=?
秦始皇和汉武帝各自的功劳是?(用1·······2·······3··········来说)
2[4/3y—(2/3y—1/2)]=3/4y急·································!1
(1994+1992+······+4+2)—(1+3+5+······+1991+1993)=( )
地震自救小常识(1、···2、···3、···五条以上)
1+1/(1+2)+1/(1+2+3)+·····+1/(1+2+3+·····+n) 求和
计算(+1)+(-2)+(+3)+(-4)+······+(-100)+(+101)+(-102)
(1+3+5++7+9······+2011)-(2+4+6+8······+2012)=
(1+3+5+······2013)—(2+4+6······+2014)用简便方法哦,这是奥数题.
1+2+3+4+5+······+9999=( ) 急用
1+2+3+4+5+······+100(用简便算法)
1+(-2)+3+(-4)···········+99-100等于多少
判断下列无穷级数的敛散性(1)1+2+3+···+n+···(2)1/(1·2)+1/(2·3)+···+1/n(/n+1)+···
函数F(X)=【①2x^3+3x^2+1(x≤0),②e^ax(x>0)】在区间[-2,2]上的最大值为2,则a的取值范围································F(x)为分段函数,跪求大哥帮解答···············
求函数的定义域和值域(1)y=2^x+3好心人帮帮忙吧!~···········
急·····················1+2+3+...+999=?
按要求完成句子.要求:1)用“无论······还是·····无论······还是······”的句按要求完成句子.要求:1)用“无论······还是·····无论······还是······”的句式.2)