1/17+2/17+3/17+...+15/17+16/17+1+16/17+15/17+...+3/17+2/17+1/17=
问题描述:
1/17+2/17+3/17+...+15/17+16/17+1+16/17+15/17+...+3/17+2/17+1/17=
答
=(1/17+16/17)+(2/17+15/17)+...+(16/17+1/17)+1=17