1/2乘4+1/4乘6+1/6乘8+......+1/2010乘2012.要过程
答案:2 悬赏:60
解决时间 2021-01-19 05:04
- 提问者网友:鐵馬踏冰河
- 2021-01-18 22:53
1/2乘4+1/4乘6+1/6乘8+......+1/2010乘2012.要过程
最佳答案
- 二级知识专家网友:逃夭
- 2021-01-18 23:11
解:
原式=(1/2)*[2/(2*4)+2/(4*6)+2/(6*8)+……+2/(2010*2012)]
=(1/2)*[(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+……+(1/2010-1/2012)]
=(1/2)*[1/2-1/2012]
=1005/4024
原式=(1/2)*[2/(2*4)+2/(4*6)+2/(6*8)+……+2/(2010*2012)]
=(1/2)*[(1/2-1/4)+(1/4-1/6)+(1/6-1/8)+……+(1/2010-1/2012)]
=(1/2)*[1/2-1/2012]
=1005/4024
全部回答
- 1楼网友:妄饮晩冬酒
- 2021-01-18 23:27
1/2乘4+1/4乘6+1/6乘8+......+1/2010乘2012
=1/2(1/2-4/1+1/4-1/6+1/6-1/8……+1/2012-1/2012) 注:1/(2x4)=1/2(1/2-1/4)
=1/2(1/2-1/2012)
=1/2x1005/2012
=1005/4024
=1/2(1/2-4/1+1/4-1/6+1/6-1/8……+1/2012-1/2012) 注:1/(2x4)=1/2(1/2-1/4)
=1/2(1/2-1/2012)
=1/2x1005/2012
=1005/4024
我要举报
如以上问答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯