1⼀1x2+1⼀2x3+1⼀3x4+1⼀4x5...1⼀2001x2002 简便计算

2024-12-26 13:54:04
推荐回答(1个)
回答1:

1/1x2+1/2x3+1/3x4+1/4x5...1/2001x2002
=1-1/2+1/2-1/3+1/3-1/4+....+1/2001-1/2002
=1-1/2002
=2001/2002