1/1*2+1/2+3+1/3*4+1/4*5+……+1/199*200

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 11:14:43
1/1*2+1/2+3+1/3*4+1/4*5+……+1/199*200

1/1*2+1/2+3+1/3*4+1/4*5+……+1/199*200
1/1*2+1/2+3+1/3*4+1/4*5+……+1/199*200

1/1*2+1/2+3+1/3*4+1/4*5+……+1/199*200
=1-1/2+1/2-1/3+1/3-1/4+……+1/199-1/200
=1-1/200
=199/200