先化简再求值:(1/x²-2x+1+(x²+2x+1/x²-1)÷(x²/x四次方-2x³+x)
问题描述:
先化简再求值:(1/x²-2x+1+(x²+2x+1/x²-1)÷(x²/x四次方-2x³+x)
答
(1/x²-2x+1+(x²+2x+1/x²-1)÷(x²/x四次方-2x³+x²)=【1/(x-1)²+(x+1)²/(x+1)(x-1)】÷1/(x-1)²=1+(x+1)(x-1)=1+x²-1=x²如果本题有什么不明白可以追问,...