计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 13:56:54

计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)
计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)

计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)
1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)
=[1/x - 1/(x+1)] +[1/(x+1) - 1/(x+2) ]+.+[1/(x+99) - 1/(x+100)]
=1/x - 1//(x+100)
=100/x(x+100)