分式方程 1.1/x-1+1/x^2-12.2-x/3+x=1/2+1/x+3^代表平方/代表分数线（除号）不好意思 ..第一个题有问题.应该是 1/x-1=1/x^2-1

1. 1/x-1=1/x^2-1 1/(x-1)=1/(x^2-1)1/(x-1)=1/(x-1)(x+1)1=1/(x+1)x+1=1x=02. 2-x/3+x=1/2+1/x+3 (2-x)/(3+x)=1/2+1/(x+3)(2-x)/(3+x)=(x+3)/2*(x+3)+2/2(x+3)(2-x)/(3+x)=(x+5)/2*(x+3)4-2x=x+53x=-1x=-1/3你的题...