搜搜做题作业网(1/x-y+1/x+y)÷xy/x^2-y^2
来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：数学作业 时间：2024/04/28 00:09:10
(1/x-y+1/x+y)÷xy/x^2-y^2
2.2x-6/x-2÷x-3/x^2-4x+4 3.(1/b-1/a)乘ab/a^2-b^2
2.2x-6/x-2÷x-3/x^2-4x+4 3.(1/b-1/a)乘ab/a^2-b^2
(1/x-y+1/x+y)÷xy/x^2-y^2
=[(x+y)/(x^2-y^2)+(x-y)/(x^2-y^2)]×(x^2-y^2)/xy
=(x+y+x-y)/(x^2-y^2)×(x^2-y^2)/xy
=2x/xy
=2/y
2x-6/x-2÷x-3/x^2-4x+4
=2(x-3)/(x-2)×(x-2)^2/(x-3)
=2(x-2)
=2x-4
(1/b-1/a)乘ab/a^2-b^2
=(a-b)/ab×ab/[(a+b)(a-b)]
=1/(a+b)
=[(x+y)/(x^2-y^2)+(x-y)/(x^2-y^2)]×(x^2-y^2)/xy
=(x+y+x-y)/(x^2-y^2)×(x^2-y^2)/xy
=2x/xy
=2/y
2x-6/x-2÷x-3/x^2-4x+4
=2(x-3)/(x-2)×(x-2)^2/(x-3)
=2(x-2)
=2x-4
(1/b-1/a)乘ab/a^2-b^2
=(a-b)/ab×ab/[(a+b)(a-b)]
=1/(a+b)
(x+y-2xy)(x+y-2)+(1-xy)²
【(1)/(x-y)+(1)/(x-y)】÷(2x)/(x²-2xy+y²)
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先化简,再求值(x-y/x+y)^2÷(y-x/x^2+2xy+y^2)^2*1/x+y,其中x=-4,y=1
(1/x-y+1/x+y)÷xy/x^2-y^2
（1）x-y/x-2y÷x^2-y^2/x^2-4xy+4y^2
xy-1+x-y
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【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy-