来自马维华的问题
【1/(x+1)+2/(x-1)=4/(x2-1)】
1/(x+1)+2/(x-1)=4/(x2-1)
1回答
2020-05-10 22:42
【1/(x+1)+2/(x-1)=4/(x2-1)】
1/(x+1)+2/(x-1)=4/(x2-1)
1/(x+1)+2/(x-1)=4/(x+1)(x-1)
两边乘(x+1)(x-1)
x-1+2(x+1)=4
x-1+2x+2=4
3x=3
x=1
经检验,x=1,分母x-1=0,增根,舍去
所以方程无解