先化简,在求值:(1/x+x²-2x+1/x²-1)÷x-1/x+1,其中x=2.
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/25 23:54:27
先化简,在求值:(1/x+x²-2x+1/x²-1)÷x-1/x+1,其中x=2.
先化简,在求值:(1÷x+1\x05+\x05x²-2x+1÷ x²-1)÷ x-1÷x+1,其中x=2.答案等于2,x²-2x+1这一步请详细讲解.
先化简,在求值:(1÷x+1\x05+\x05x²-2x+1÷ x²-1)÷ x-1÷x+1,其中x=2.答案等于2,x²-2x+1这一步请详细讲解.
(1÷x+1+x²-2x+1÷ x²-1)÷ x-1÷x+1
=(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)
=2÷(2-1)
=2
=(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)
=2÷(2-1)
=2
先化简在求值(x-1/3x-x+1/x)*x/x²-1,其中x=√2-3
先化解,在求值;(3x/x-1-x/x+1)÷x四次方-4x²/x³-x,其中x=根号2+2
先化简代数式再求值(3/x+1 - x+1)÷x²-2x/x+1,其中x满足方程x/x-1+1/x=1
先化简,再求值:x+1/x除以(x- 1+x²/2x),其中x=根号2+1
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
先化简,在求值 1/x+1-x+3/x²-1*x²-2x+1/x²+4x+3,其中x=2
先化简,在求值(2x/x-3-x/x+3)×x^2-9/x,其中x=1
化简求值(x+2)(x-2)-(x-2)²+2x,其中x=1
先化简,再求值(x+1/(x²-x)-x/(x²-2x-1))÷1/x,其中x=根号2+1
先化简,再求值:1/x+1-3-x/x²-6x+9÷x²+x/x-3,其中x=根号2.
先化简,再求值(x²/x-1 -3x/1-x)/x²/x-1,其中x=3