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> 下列分式方程有解的是()A.2x+1+3x-1=6x2-1B.x2+1x=0C.22x-1=0D.1x-1=1-数学
下列分式方程有解的是()A.2x+1+3x-1=6x2-1B.x2+1x=0C.22x-1=0D.1x-1=1-数学
题目简介
下列分式方程有解的是()A.2x+1+3x-1=6x2-1B.x2+1x=0C.22x-1=0D.1x-1=1-数学
题目详情
下列分式方程有解的是( )
A.
2
x+1
+
3
x-1
=
6
x
2
-1
B.
x
2
+1
x
=0
C.
2
2x-1
=0
D.
1
x-1
=1
题型:单选题
难度:中档
来源:不详
答案
A、把分式方程化为整式方程后算出来的结果为x=1,最简公分母为0,故无解.
B、把分式方程化为整式方程后得到x2+1=0,x2=-1这是不可能的,故无解.
C、
class="stub"2
2x-1
=0
,那么分子应为0.可分子为2,故无解.
D、化为整式方程后算出来的结果为x=2,最简公分母不为0,故有解.
故选D.
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题目简介
下列分式方程有解的是()A.2x+1+3x-1=6x2-1B.x2+1x=0C.22x-1=0D.1x-1=1-数学
题目详情
答案
B、把分式方程化为整式方程后得到x2+1=0,x2=-1这是不可能的,故无解.
C、
D、化为整式方程后算出来的结果为x=2,最简公分母不为0,故有解.
故选D.