1/42+1/56+1/72+1/90+1/110+1/132.求简便算法
1/42+1/56+1/72+1/90+1/110+1/132.求简便算法
数学人气：454 ℃时间：2019-09-25 09:33:29
优质解答
1/42+1/56+1/72+1/90+1/110+1/132=1/(6x7)+1/(7x8)+1/(8x9)+1/(9x10)+1/(10x11)+1/(11x12)=1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10+1/10-1/11+1/11-1/12=1/6-1/12=1/12
我来回答
类似推荐
猜你喜欢
- 1各物质表示的化学反应速率数值之比为什么等于化学方程式中各物质的化学计量数之比?
- 2三个不同的实数a，b，c成等差数列，且a，c，b成等比数列，则a：b：c=_．
- 3I often climb mountains on the weekends.改为反问句
- 4读英语句子怎么断句
- 51.按意思写词语.
- 6好词好句好段摘抄大全 段 短一点的 词最好是四字的 句也短一点 给赏
- 7在中秋节英语怎么说
- 8The chinese meaning of the word"volunteer"是什么意思?
- 9在等腰三角形ABC中,AB=AC,BE平分角ABC,CE平分角ACB,DF//BC,点E在DF上,若AB=2,求三角形ADF的周长
- 10_ that they are fresh from university,the young people have done a good job.A) Given B) Because C) Giving D) As