中科新闻网是一部内容开放、自由的互动网络百科全书客观、专业、权威的知识性百科全书
来源:百度文库 编辑:中科新闻网 时间:2024/05/04 23:53:37
1/(x(x+2)) = (1/2) * (1/x - 1/(x+2))(1/2) * (1/x - 1/(x+2)) = (1/2) * (A/x-B/(x+2))1/x - 1/(x+2) = A/x-B/(x+2)A=1B=1
令 x=1,得3A-B=2令 x=-1,得A+B=2解得,A=1,B=1