)=√3-√2, ③1/√4+√3=(√4-√3)/(√4+√3)(√4-√3)=√4-√3:;……从计算结果中寻找规律,并利用这一规律计算:【1/(√2+1)+1/(√3+√2+1/(√4+√3)+……+1/(√2001+√2002)】(√2002+1)=?
初三的题 要过程 给分哦 马上就要
观察下列等式①1/√2+1=√2-1/(√2+1)(√2-1)=√2-1, ②1/√3+√2=√3-√2/(√3+√2)(√3-√2
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解决时间 2021-04-05 22:29
- 提问者网友:龅牙恐龙妹
- 2021-04-05 08:39
最佳答案
- 五星知识达人网友:毛毛
- 2021-04-05 09:01
解:
(1)规律为:1/[√n+√(n-1)]=√n-√(n-1)
(2)
1/(√2+1)+1/(√3+√2+1/(√4+√3)+……+1/(√2001+√2002)
=√2-1+√3-√2+√4-√3+……+√2002-√2001
=√2002-1
[1/(√2+1)+1/(√3+√2+1/(√4+√3)+……+1/(√2001+√2002)](√2002+1)
=(√2002-1)(√2002+1)
=2002-1
=2001
(1)规律为:1/[√n+√(n-1)]=√n-√(n-1)
(2)
1/(√2+1)+1/(√3+√2+1/(√4+√3)+……+1/(√2001+√2002)
=√2-1+√3-√2+√4-√3+……+√2002-√2001
=√2002-1
[1/(√2+1)+1/(√3+√2+1/(√4+√3)+……+1/(√2001+√2002)](√2002+1)
=(√2002-1)(√2002+1)
=2002-1
=2001
全部回答
- 1楼网友:夜余生
- 2021-04-05 10:40
搜一下:观察下列等式①1/√2+1=√2-1/(√2+1)(√2-1)=√2-1, ②1/√3+√2=√3-√2/(√3+√2)(√3-√2
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