1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9....+1/99 怎么简便运算了?
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10+...1\/100这道题怎样简算
他的方法很简单: 1 +1\/2+1\/3 +1\/4 + 1\/5+ 1\/6+1\/7+1\/8 +... 1\/2+1\/2+(1\/4+1\/4)+(1\/8+1\/8+1\/8+1\/8)+... 注意后一个级数每一项对应的分数都小于调和级数中每一项,而且后面级数的括号中的数值和都为1\/2,这样的1\/2有无穷多个,所以后一个级数是趋向无穷大的,...
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+……1\/99有简便方法吗
计算结果和fortran代码如下:
1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10。计算结果。
计算1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10的过程如下:首先,我们可以通过拆分求和的方法简化计算:= 1 + (1\/2 + 1\/3 + 1\/6) + (1\/4 + 1\/5 + 1\/10) + 1\/7 + 1\/8 + 1\/9 = 1 + 1 + (1\/2 + 1\/3 - 1\/6) + (1\/4 + 1\/5 + 1\/10)= 1 +...
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=?有简洁的做法么?
1\/2+3+4+5+6+7+8+9=1\/44.^_^
1\/2+1\/3+1\/4+1\/5+...
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7 =(1\/2+1\/3+1\/6)+(1\/4+1\/5+1\/7)=1+(9\/20+1\/7)=1+(63\/140+20\/140)=1+83\/140 =1又83\/140
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=?
1\/2、1\/4、1\/5、1\/8都是能化成有限小数,而1\/3+1\/6=1\/2。只剩下1\/7和1\/9不能化成有限小数。1\/7+1\/9=16\/63=0.253968253968……所以:1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=1+0.25+0.2+0.125+0.253968253968……=1.8289682539(是一个循环小数,它的循环节是382539)...
(1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10+1\/11+1\/12+1\/13+1\/14+1\/15...
归纳一下,就可以化成1\/15*(1+2+...+14)+1\/14*(1+2+...+13)+...1\/3*(1+2)+1\/2 然后根据括号内可以用等差求和的方法每个单项式归纳为1\/n*n\/2*(n-1)=(n-1)\/2 所以将N分别取15到2 提取公因式1\/2 最后变成(1+3+4+...+14)\/2=52.5 ...
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10等于多少?
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10 =(1\/2+1\/3+1\/6)+(1\/4+1\/5+1\/10)+1\/7+1\/8+1\/9 =1+11\/20+1\/8+1\/7+1\/9 =1+27\/40+1\/9+1\/7 =1+283\/360+1\/7 =1+2341\/2520 =4861\/2520
1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+...+1\/n 的 解题方法是什么??谢谢...
这道题是没有简便公式可算的,有公式也是直接通分,没意思 一般数据大了就只有用计算机编程计算
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8=481\/280≈1.71786 直接通分计算没有简便办法.只有项数特别多少,才有一个近似公式.1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+...+1\/n = Ln[n]+0.57721566490153286060651209008240