1/2+1/6+1/12+…………+1/90+1/100+1/132不会做,
问题描述:
1/2+1/6+1/12+…………+1/90+1/100+1/132不会做,
越简单越好,
答
1/2+1/6+1/12+…………+1/90+1/100+1/132
=1-1/2+1/2-1/3+.+1/10-1/11+1/11-1/12
=1-1/12
=11/12