作业帮1/2x4+1/4x6+1/6x8+……+l/48x50
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 09:40:40
1/2x4+1/4x6+1/6x8+……+l/48x50
1/2x4+1/4x6+1/6x8+……+l/48x50
1/2x4+1/4x6+1/6x8+……+l/48x50
原式=1/4x(1/1x2+1/2x3+1/3x4+.+1/24x25)
=1/4x(1-1/2+1/2-1/3+1/3-1/4+.+1/24-1/25)
=1/4x(1-1/25)
=6/25