设A=x/x-1 B=3/x²-1 +1当x为何值时AB值相等
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 09:51:47
![设A=x/x-1 B=3/x²-1 +1当x为何值时AB值相等](/uploads/image/z/5900803-43-3.jpg?t=%E8%AE%BEA%3Dx%2Fx-1+B%3D3%2Fx%26%23178%3B-1+%2B1%E5%BD%93x%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6AB%E5%80%BC%E7%9B%B8%E7%AD%89)
x){nm~~5mt';v=;iÞgӷ9:w<_iTOV;}{cfMpC4
!*w,yo瓝3^
|o= HZ!vP.5w?[rUP F@ :S
设A=x/x-1 B=3/x²-1 +1当x为何值时AB值相等
设A=x/x-1 B=3/x²-1 +1当x为何值时AB值相等
设A=x/x-1 B=3/x²-1 +1当x为何值时AB值相等
令A=B
则x/(x-1)=3/(x²-1)+1
两边乘以x²-1得:
x(x+1)=3+(x²-1)
x²+x=3+x²-1
x=2
经检验x=2时,A=B