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> 下列方程中分式方程有()个.(1)x2-x+1x;(2)1a-3=a+4;(3)1x-x=3;(4)20x+y-10x-y=1.A.1B.2C.3D.以上都不对-数学
下列方程中分式方程有()个.(1)x2-x+1x;(2)1a-3=a+4;(3)1x-x=3;(4)20x+y-10x-y=1.A.1B.2C.3D.以上都不对-数学
题目简介
下列方程中分式方程有()个.(1)x2-x+1x;(2)1a-3=a+4;(3)1x-x=3;(4)20x+y-10x-y=1.A.1B.2C.3D.以上都不对-数学
题目详情
下列方程中分式方程有( )个.
(1)x
2
-x+
1
x
;(2)
1
a
-3=a+4;(3)
1
x
-x=3
;(4)
20
x+y
-
10
x-y
=1.
A.1
B.2
C.3
D.以上都不对
题型:单选题
难度:中档
来源:不详
答案
(1)x2-x+
class="stub"1
x
不是等式,故不是分式方程;
(2)
class="stub"1
a
-3=a+4是分式方程;
(3)
class="stub"1
x
-x=3
是无理方程,不是分式方程;
(4)
class="stub"20
x+y
-
class="stub"10
x-y
=1是分式方程.
故选B.
上一篇 :
分式方程12x-3=1的解为______.-
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题目简介
下列方程中分式方程有()个.(1)x2-x+1x;(2)1a-3=a+4;(3)1x-x=3;(4)20x+y-10x-y=1.A.1B.2C.3D.以上都不对-数学
题目详情
(1)x2-x+
答案
(2)
(3)
(4)
故选B.