问题描述: 1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=0 1个回答 分类: 数学 2014-10-05 问题解答: 我来补答 1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=01/x+1/x-1/(x+1)+1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+...1/(x+9)-1/(x+10)=02/x-1/(x+10)=0(x+20)/x(x+10)=0x+20=0x=-20经检验x=-20是原方程的解 再问: ������� 再答: ��Ŀ��ˣ�ֻ��������再问: � 展开全文阅读