先化简再求值1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1 其中X是最小的非负整数.

先化简再求值1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1 其中X是最小的非负整数.
先化简再求值1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1 其中X是最小的非负整数.

先化简再求值1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1 其中X是最小的非负整数.
1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1
=1-[(1-x-1)/(1-x)]² ×(x-1)²/(x²-x+1)
=1-x²/(x-1)²×(x-1)²/(x²-x+1)
=1-ײ/(x²-x+1)
=(x²-x+1-x²)/(x²-x+1)
=(1-x)/(x²-x+1)
当x=0时
原式=1

1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1=1-[（1-x-1）/1-x]/[（x^2-x+1）/(x-1)^2]
=1-[x/(x-1)] *[(x-1)^2/(x^2-x+1)]
=1-[x/(x^2-x+1)]
=(x^2-x+1+x)/(x^2-x-1)
=(x^2+1)/(x^2-x-1)
由题意x=0...

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1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1=1-[（1-x-1）/1-x]/[（x^2-x+1）/(x-1)^2]
=1-[x/(x-1)] *[(x-1)^2/(x^2-x+1)]
=1-[x/(x^2-x+1)]
=(x^2-x+1+x)/(x^2-x-1)
=(x^2+1)/(x^2-x-1)
由题意x=0
原式=-1

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1-（1- 1/1-X）²÷ X²-X+1/X²-2X+1
=1-[x²/（1-x）² ]÷（x²-x+1）/（1-x）²
=1-（x²/x²-x+1）
=（x-1）/（x²-x+1）
∵x是最小的非负整数
∴x=0
∴原式=（-1）/1
=-1

1-(x-1/1-x)^2÷x^2-x+1/x^2-2x+1,其中x^2-x+5=0
=1-(x-x²-1)²/(1-x)²÷(x²-x+1)/(x-1)²
=1-(x²-x+1)²/(x²-x+1)
=1-x²+x-1
=-(x²-x)
=-(-5)
=5