解方程:1/(x²-1)-2/(x+1)+3/(1-x)=0
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解方程:1/(x²-1)-2/(x+1)+3/(1-x)=0
解方程:1/(x²-1)-2/(x+1)+3/(1-x)=0
解方程:1/(x²-1)-2/(x+1)+3/(1-x)=0
1/(x²-1)-2/(x+1)+3/(1-x)=0
1/(x²-1)-2/(x+1)-3/(x-1)=0
同乘以(x^2-1)则
1-2(x-1)-3(x+1)=0
1-2x+2-3x-3=0
-5x=0
x=0
1/(x²-1)-2/(x+1)+3/(1-x)=0
两边同乘以(x+1)(x-1)
1-2(x-1)-3(x+1)=0
1-2x+2-3x-3=0
5x=0
x=0