计算 [(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) [1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) 二:[1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/15 21:33:19

计算 [(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) [1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) 二:[1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)
计算 [(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) [1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)
一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x)
二:[1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)

计算 [(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) [1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) 二:[1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)
一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x)
=[(2/3x)-2/(2x-y)]÷(x-y/x)
=2/(3(x-y))-2x/(3(2x-y)(x-y))
=(2(2x-y)-2x*3)/(3(2x-y)(x-y))
=(-2(x+y))/(3(2x-y)(x-y))
=(-2x-2y)/(6x^2-9xy+3y^2)
二:[1/(a+b)²-1/（a-b）²]÷（1/a+b - 1/a-b)
=[1/(a+b)²-1/(a+b)(a-b)]÷[(a-b) - (a+b)]
=[(a-b) - (a+b)]÷[(a-b) - (a+b)]
=1

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