1.(1/X-1 )-2=X^-3X/X^-1
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 17:18:26
1.(1/X-1 )-2=X^-3X/X^-1
2.(X/X+1)^+5(X/X+1)+6=0
3.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
2.(X/X+1)^+5(X/X+1)+6=0
3.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
1.1/(X-1)-2=(X^2-3X)/(X^2-1)
(1-2X+2)/(X-1)=(X^2-3X)/(X^2-1)
两边乘X^2-1
(3-2X)(X+1)=X^2-3X
-2X^2+X+3=X^2-3X
3X^2-4X-3=0
X=(2±√13)/3
分式方程要检验
经检验,X=(2±√13)/3都是方程的解
2.(X/X+1)^+5(X/X+1)+6=0
令a=X/(X+1)
a^2+5a+6=0
(a+2)(a+3)=0
a=-2,a=-3
X/(X+1)=-2,X=-2X-2,X=-2/3
X/(X+1)=-3,X=-3X-3,X=-3/4
经检验,X=-2/3和X=-3/4都是方程的解
3.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
(1-2X+2)/(X-1)=(X^2-3X)/(X^2-1)
两边乘X^2-1
(3-2X)(X+1)=X^2-3X
-2X^2+X+3=X^2-3X
3X^2-4X-3=0
X=(2±√13)/3
分式方程要检验
经检验,X=(2±√13)/3都是方程的解
2.(X/X+1)^+5(X/X+1)+6=0
令a=X/(X+1)
a^2+5a+6=0
(a+2)(a+3)=0
a=-2,a=-3
X/(X+1)=-2,X=-2X-2,X=-2/3
X/(X+1)=-3,X=-3X-3,X=-3/4
经检验,X=-2/3和X=-3/4都是方程的解
3.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
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