（x-1+1/x+1)÷（x+x/x-1)怎么算?现在就要!

来源：学生作业学帮网编辑：学帮网时间：2024/05/30 22:23:23

原式
=[(x-1)(x+1)+1]/(x+1)÷[x(x-1)+x]/(x-1)
=[x²-1+1]/(x+1)÷[x²-x+x]/(x-1)
=x²/(x+1)÷x²/(x-1)
=x²/(x+1)*(x-1)/x²
=(x-1)/(x+1)

先算括号里的，X-1可以看成（x-1）/1,通分，分母为x+1，右边的同理x变为【x（x-1）】/(x-1),进行计算，懂吧？

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