1/(a-1)=1/(a^2-1)x 1/(x-1)+1/(1+x)(-z)/(-xy)=____(-5-y)/(-x)=_____分式方程(x)/(x-3)+1=m/(x-3)有增根,则m等于( )------------------------回答题目要写过程-------------------------
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1/(a-1)=1/(a^2-1)x 1/(x-1)+1/(1+x)(-z)/(-xy)=____(-5-y)/(-x)=_____分式方程(x)/(x-3)+1=m/(x-3)有增根,则m等于( )------------------------回答题目要写过程-------------------------
1/(a-1)=1/(a^2-1)
x
1/(x-1)+1/(1+x)
(-z)/(-xy)=____
(-5-y)/(-x)=_____
分式方程(x)/(x-3)+1=m/(x-3)有增根,则m等于( )
------------------------回答题目要写过程-------------------------
1/(a-1)=1/(a^2-1)x 1/(x-1)+1/(1+x)(-z)/(-xy)=____(-5-y)/(-x)=_____分式方程(x)/(x-3)+1=m/(x-3)有增根,则m等于( )------------------------回答题目要写过程-------------------------
第三个不懂你什么意思
1. 可以交叉向乘,得:a^2-1=a-1
a^2-a=0 a=0或a=1(舍去) 因为分母不能为0
所以a=0
2. 通分: 原式= (x+1)/(x^2-1)+(x-1)/(x^2-1)
= x^2/(x^2-1)
4. 两边同乘(x-3) 得: x+x-3=m
m=2x-3
出现增根唯一可能是x=3 即,分母为0
所以m=3