(2011•宝应县模拟)先化简,再求值:x−1x÷(x−1x)
先化简,再求值:(x−1x
先化简,再求值:(x−1x−x−2x+1)÷2x
先化简,再求值(x−1−8x+1)÷x+3x+1
(2010•虹口区二模)先化简,再求值:(1−1x+2)÷x
先化简,再求值:1x+2−x
先化简,再求值:[x+2/(x^2-2x)-(x-1)/(x^2-4x+4)]÷2x-8/(x^3-2x^2)
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
(2011•香坊区模拟)先化简再求代数式x−22x+2÷(x−1−3x+1)
(2012•广陵区二模)先化简再求值:(3x−1−x−1)÷x−2x
先化简,再求值:(1)(x+1/x²-x-x/x²-2x+1)÷1/x,x=根号2+1
先化简,再求值(2x-6)/(4-4x+x^2)÷ (x+3)× (x^2+x-6)/(3-x),其中x=-1/2
先化简,再求值:(1x