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\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10
分母是2的倍数通分加一起,是3倍数的加一起,是5倍数的加一起,是7倍数的加一起.不要重复.接着相加.可以试一试.
1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10=多少
= 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 + (1 - 1\/6) + (1\/2 + 1\/4 + 1\/5 + 1\/10)= 1 + 1 + 5\/6 + (1\/2 + 1\/4 + 2\/10)=...
1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10。计算结果。
1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10 =1+(1\/2+1\/3+1\/6)+(1\/4+1\/5+1\/10)+1\/7+1\/8+1\/9 =1+1+11\/20+1\/8+1\/7+1\/9 =1+1+27\/40+1\/9+1\/7 =1+1+283\/360+1\/7 =1+1+2341\/2520 =1+4861\/2520 ≈2.92896 ...
数列计算 1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=?
这个级数是发散的。简单的说,结果为∞ --- 用高中知识也是可以证明的,如下:1\/2≥1\/2 1\/3+1\/4>1\/2 1\/5+1\/6+1\/7+1\/8>1\/2 ……1\/[2^(k-1)+1]+1\/[2^(k-1)+2]+…+1\/2^k>[2^(k-1)](1\/2^k)=1\/2 对于任意一个正数a,把a分成有限个1\/2 必然能够...
1\/2+1\/3+1\/4+...+1\/10 的循环节是什么 ,给出计算过程
用电脑算的,答案是4861\/2520=1.928 968253 968253 ...循环节是968253
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
没有,这是调和数列,很早就有数学家研究,比如中世纪后期的数学家Oresme在1360年就证明了这个级数是发散的。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...
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=?
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)。祝你开心 ...
...竞赛题:1+1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10的循环节是多少...
1=1.175 1\/3、1\/6、1\/7、1\/9产生循环节,最小公约数126,相加 = (42 + 21 + 18 + 14)\/126 = 95\/126 = 0.7 539682 539682 ……混循环,循环节是539682 1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10结果 = 1.928 968253 968253 968253……因此最终循环节是968253 ...
小学题目 帮帮忙 1\/(1+2+3)+1\/(2+3+4)+1\/(3+4+5)+…+1\/(9+
分母为等差数列,公差为3 原式=1\/3(1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9+1\/10)=1\/3【(1\/2+1\/3+1\/6)+1\/4+1\/8+1\/5+1\/10+1\/7+1\/9】=1\/3(1+3\/8+3\/10+16\/63)=4261\/5760