1/1x2+1/2x3+1/3x4+.+1/2003x2004等于多少
问题描述:
1/1x2+1/2x3+1/3x4+.+1/2003x2004等于多少
答
1/1x2+1/2x3+1/3x4+.+1/2003x2004
=1-1/2+1/2-1/3+1/3-1/4+.+1/2003-1/2004
=1-1/2004
=2003/2004