1\2+(1\3+2\3)+(1\4+2\4+3\4)+……(1\50+2\50+……49\50)=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 12:02:40
![1\2+(1\3+2\3)+(1\4+2\4+3\4)+……(1\50+2\50+……49\50)=?](/uploads/image/z/12016202-50-2.jpg?t=1%5C2%2B%281%5C3%2B2%5C3%29%2B%281%5C4%2B2%5C4%2B3%5C4%29%2B%E2%80%A6%E2%80%A6%EF%BC%881%5C50%2B2%5C50%2B%E2%80%A6%E2%80%A649%5C50%EF%BC%89%3D%3F)
1\2+(1\3+2\3)+(1\4+2\4+3\4)+……(1\50+2\50+……49\50)=?
1\2+(1\3+2\3)+(1\4+2\4+3\4)+……(1\50+2\50+……49\50)=?
1\2+(1\3+2\3)+(1\4+2\4+3\4)+……(1\50+2\50+……49\50)=?
先写出它的通项,之后利用等差数列求和公式代入计算即可
具体解题步骤如下: