1/1x1/2-1/2x1\3-1\3x1/4...1/99x1/100
问题描述:
1/1x1/2-1/2x1\3-1\3x1/4...1/99x1/100
答
1/1x1/2-1/2x1\3-1\3x1/4...1/99x1/100
=1-1/2+1/2-1/3+...+1/99-1/100
=99/100