分式方程1+x分之1+1-x=x2次方-1分之3
1) 1/(1+x)+1-x=3/(x²-1)
(x-1)+(x²-1)-x(x²-1)=3
x-1+x²-1-x³+x=3
-x³+x²+x-1+x-1=3
x³-x²-2x-1=0
該方程僅有一個(gè)實(shí)數(shù)根x≈0.69336
2) 1+1/x+1-x=x²-3/1
2+1/x-x=x²-3
2x+1-x²=x³-3x
x³+x²-3x-2x-1=0
x³+x²-5x-1=0
x1≈1.90321
x2≈-0.19394
x3≈-2.70928
3) .