计算(1+x-1分之1)*x分之x的平方-1
问题描述：
计算(1+x-1分之1)*x分之x的平方-1
答
这是分式运算，按通分约分的方法进行
[1+1/(x-1)]*(x^2-1)/x
=x/(x-1)*[(x+1)(x-1)]/x
=x=1
答
[1+1/(x+1)]*(x²-1)/x
=[（x+1)/(x+1)+1/(x+1)]*[(x+1)*(x-1)/x]
=[(x+2)/(x+1)]*[(x+1)*(x-1)/x]
=x分之[(x+2)(x-1)]
答
(1+x-1分之1)*x分之x的平方-1
=(x-1+1)/(x-1)* （x+1）(x-1)/x
=x*(x+1)/x
=x+1
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答
(1+x-1分之1)*x分之x的平方-1
=[(x/(x-1)][(x^2-1)/x]
=[(x/(x-1)][(x-1)(x+1)/x]
=x+1