数学题化简再求值化简再求值那是x² ,不要看错了

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数学题化简再求值化简再求值那是x² ,不要看错了
数学题化简再求值
化简再求值
那是x²  ,不要看错了


数学题化简再求值化简再求值那是x² ,不要看错了
原式=[1/(x+1)+(x-1)^2/(x+1)(x-1)]×[(x+1)/(x-1)]
=[1/(x+1)+(x-1)/(x+1)]×[(x+1)/(x-1)]
=x/(x+1)×[(x+1)/(x-1)]
=x/(x-1)

[1/(x+1)+(x²-2x+1)/(x²-1)】÷(x-1)/(x+1)
=(x-1+x²-2x+1)/[(x-1)(x+1)]*(x+1)/(x-1)
=x(x-1)/[(x-1)(x+1)]*(x+1)/(x-1)
=x/(x-1)

由于没有给出X的具体值,故无法求代数式值


希望可以帮到你。

解:原式=[1/(x 1) (x-1)/(x 1)] (x-1)/(x 1)
=(1 x-1 x-1)/(x 1)
=(2x-1)/(x 1)