1/1*2=1/1-1/2;1/2*3=1/2-1/3;1/3*4=1/3-1/4;1/4*5=1/4-1/5...1/
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/07 22:32:34
1/1*2=1/1-1/2;1/2*3=1/2-1/3;1/3*4=1/3-1/4;1/4*5=1/4-1/5...1/n(n-1)=?1/1*2+1/2*3+...+1/99*100
1/1*2=1/1-1/2;
1/2*3=1/2-1/3;
1/3*4=1/3-1/4;
1/4*5=1/4-1/5
...
1/n(n-1)=1/(n-1)-1/n
1/1*2+1/2*3+...+1/99*100
=(1/1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+...+(1/99-1/100)
=1/1- 1/100
=99/100
1/2*3=1/2-1/3;
1/3*4=1/3-1/4;
1/4*5=1/4-1/5
...
1/n(n-1)=1/(n-1)-1/n
1/1*2+1/2*3+...+1/99*100
=(1/1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+...+(1/99-1/100)
=1/1- 1/100
=99/100
1/1*2=1/1-1/2;1/2*3=1/2-1/3;1/3*4=1/3-1/4;1/4*5=1/4-1/5...1/
1/1×2+1/1-1/2:;1/2×4=1/2×(1/2-1/4);1/58×=1/3(×1/5-1/8)
(1-3/1)(1-2/1)= = (1-4/1)(1-3/1)= = (1-5/1)(1-4/1)= = 一减三分之一
1+2+3-4-5+1+1+2+3=
1 2 3 4 5=1
(1+1/2+1/3+1/4)×(1/2+1+1/3+1/4+1/5)×(1/2+1/3+1/4) =简便方法
1/1*2+1/2*3+1/3*4+1/4*5.+1/2007*2008+1/2008*2009=?
(1/1+2)+(1/1+2+3)+...+(1/1+2+3+4+...+50) = (1+1/51)*(1-1/51)
1-1/2=1/2,1/2-1/3=1/6=1/2*3,1/3-1/4=1/12=1/3*4,1/4-1/5=1/20=
C语言编程,s=1+1/2-1/3+1/4-1/5.+1/n,
(1)1+2+1=4;1+2+3+2+1=_______;1+2+3+4+3+2+1=_______;1+2+3+4+5
1+1=?还有1+2+3+4+5=?