(1/2+1/3+1/4+……+1/100)x(1+1/2+1/3+……+1/99)-(1/2+1/3+……+1/99)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/13 05:53:11
(1/2+1/3+1/4+……+1/100)x(1+1/2+1/3+……+1/99)-(1/2+1/3+……+1/99)(1+1/2+1/3+……+1/100)
(1/2+1/3+1/4+……+1/100)x(1+1/2+1/3+……+1/99)-(1/2+1/3+……+1/99)(1+1/2+1/3+……+1/100)
令a=1/2+1/3+……+1/99
原式=(a+1/100)(1+a)-(a)(1+a+1/100)
=a+a^2+1/100+a/100-a-a^2-a/100
=1/100
有不懂欢迎追问
令a=1/2+1/3+……+1/99
原式=(a+1/100)(1+a)-(a)(1+a+1/100)
=a+a^2+1/100+a/100-a-a^2-a/100
=1/100
有不懂欢迎追问
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