来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/23 16:02:38
一分式代数式求化简
2/a-1 + a/2a+1 + a²-4/a²+a-2
=2/a-1 + a/2a+1 + (a+2)(a-2)/(a+2)(a-1)
=2/a-1 + a/2a+1 + a-2/a-1
=2/a-1 + a-2/a-1 + a/2a+1
=2+a-2 /a-1 + a/2a+1
=a/a-1 + a/2a+1
=a(2a+1)+a(a-1) /(a-1)(2a+1)
=3a²/(a-1)(2a+1)