1/(x²+x)+2/(x²-x)=2/(x²-1) 分式方程,
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1/(x²+x)+2/(x²-x)=2/(x²-1) 分式方程,
1/(x²+x)+2/(x²-x)=2/(x²-1) 分式方程,
1/(x²+x)+2/(x²-x)=2/(x²-1) 分式方程,
两边乘以x(x+1)(x-1)得
x-1+2(x+1)=2x
x-1+2x+2=2x
x=-1
检验:x=-1是增根
∴方程无解