初二计算题就解,急有悬赏(-x\y)²×(-y²\x)³÷(-xy^4)(-x\y)²×(-y²\x)³÷(-xy^4)(2a\a²-4)-(1\a-2)【(1\x-1)+(1\1-x²)】【1-(1\x)】【(2\3a)-(2\a+b)(a+b\3a
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![初二计算题就解,急有悬赏(-x\y)²×(-y²\x)³÷(-xy^4)(-x\y)²×(-y²\x)³÷(-xy^4)(2a\a²-4)-(1\a-2)【(1\x-1)+(1\1-x²)】【1-(1\x)】【(2\3a)-(2\a+b)(a+b\3a](/uploads/image/z/10921719-39-9.jpg?t=%E5%88%9D%E4%BA%8C%E8%AE%A1%E7%AE%97%E9%A2%98%E5%B0%B1%E8%A7%A3%2C%E6%80%A5%E6%9C%89%E6%82%AC%E8%B5%8F%EF%BC%88-x%5Cy%EF%BC%89%26%23178%3B%C3%97%EF%BC%88-y%26%23178%3B%5Cx%EF%BC%89%26%23179%3B%C3%B7%EF%BC%88-xy%5E4%EF%BC%89%EF%BC%88-x%5Cy%EF%BC%89%26%23178%3B%C3%97%EF%BC%88-y%26%23178%3B%5Cx%EF%BC%89%26%23179%3B%C3%B7%EF%BC%88-xy%5E4%EF%BC%89%EF%BC%882a%5Ca%26%23178%3B-4%EF%BC%89-%EF%BC%881%5Ca-2%EF%BC%89%E3%80%90%EF%BC%881%5Cx-1%EF%BC%89%2B%281%5C1-x%26%23178%3B%EF%BC%89%E3%80%91%E3%80%901-%EF%BC%881%5Cx%EF%BC%89%E3%80%91%E3%80%90%282%5C3a%29-%282%5Ca%2Bb%EF%BC%89%EF%BC%88a%2Bb%5C3a)
初二计算题就解,急有悬赏(-x\y)²×(-y²\x)³÷(-xy^4)(-x\y)²×(-y²\x)³÷(-xy^4)(2a\a²-4)-(1\a-2)【(1\x-1)+(1\1-x²)】【1-(1\x)】【(2\3a)-(2\a+b)(a+b\3a
初二计算题就解,急有悬赏(-x\y)²×(-y²\x)³÷(-xy^4)
(-x\y)²×(-y²\x)³÷(-xy^4)
(2a\a²-4)-(1\a-2)
【(1\x-1)+(1\1-x²)】【1-(1\x)】
【(2\3a)-(2\a+b)(a+b\3a)-a-b】÷(a-b\a)
初二计算题就解,急有悬赏(-x\y)²×(-y²\x)³÷(-xy^4)(-x\y)²×(-y²\x)³÷(-xy^4)(2a\a²-4)-(1\a-2)【(1\x-1)+(1\1-x²)】【1-(1\x)】【(2\3a)-(2\a+b)(a+b\3a
原式1=(x²/y²)×(-y^6/x³)÷(-xy^4)=1/x^4
原式2=[2a/(a²-4)]-[(a+2)/(a²-4)]=(a-2)/(a²-4)=1/(a+2)
原式3=[1/(x-1)][(x-1)/x]+[1/(1-x²)][-(1-x)/x]=(x+1)/[x×(x+1)]-1/[x×(x+1)]=1/(x+1)
原式4=(2/3a-2/3a-a-b)×a/(a-b)=-a(a+b)/(a-b)(?)这道题是不是出错了呀?前面的a-b是不是有括号呀?
1/x^2
1/a+2
1/x+1
第四题中间是什么符号=,=