计算题(详细过程)
(a-2分之a²-a-2分之1)÷(a-2分之a²-2a+1)(x-y分之1)-(2y-2x分之1)...
(a-2分之a²-a-2分之1)÷(a-2分之a²-2a+1)
(x-y分之1)-(2y-2x分之1) 展开
(x-y分之1)-(2y-2x分之1) 展开
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(a-2分之a²-a-2分之1)÷(a-2分之a²-2a+1)
=[a²/(a-2)-1/(a-2)]÷(a²-2a+1)/(a-2)
=(a²-1)/(a-2)÷(a-1)²/(a-2)
=(a-1)(a+1)/(a-2)乘(a-2)/(a-1)²
=(a+1)/(a-1)
(2)
(x-y分之1)-(2y-2x分之1)
=1/(x-y)+1/[2(x-y)]
=(2+1)/[2(x-y)]
=3/[2(x-y)]
如果你认可我的回答,请点击左下角的“采纳为满意答案”,祝学习进步!
=[a²/(a-2)-1/(a-2)]÷(a²-2a+1)/(a-2)
=(a²-1)/(a-2)÷(a-1)²/(a-2)
=(a-1)(a+1)/(a-2)乘(a-2)/(a-1)²
=(a+1)/(a-1)
(2)
(x-y分之1)-(2y-2x分之1)
=1/(x-y)+1/[2(x-y)]
=(2+1)/[2(x-y)]
=3/[2(x-y)]
如果你认可我的回答,请点击左下角的“采纳为满意答案”,祝学习进步!
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