1.若有理x.y.z.满足等式(x-1)的平方+(2x-y)的4次方+|x-3z|=0,试求(x+y)z的平方的值。2.当a =-0.2,b=0.04时,求代数式72/73(a²-b)-78/79(2a+10b)-1/4(a+b)的值。3.若a=25,b=-3,试
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![1.若有理x.y.z.满足等式(x-1)的平方+(2x-y)的4次方+|x-3z|=0,试求(x+y)z的平方的值。2.当a =-0.2,b=0.04时,求代数式72/73(a²-b)-78/79(2a+10b)-1/4(a+b)的值。3.若a=25,b=-3,试](/uploads/image/z/1619474-50-4.jpg?t=1.%E8%8B%A5%E6%9C%89%E7%90%86x.y.z.%E6%BB%A1%E8%B6%B3%E7%AD%89%E5%BC%8F%EF%BC%88x-1%29%E7%9A%84%E5%B9%B3%E6%96%B9%2B%EF%BC%882x-y%EF%BC%89%E7%9A%844%E6%AC%A1%E6%96%B9%EF%BC%8B%EF%BD%9Cx-3z%EF%BD%9C%EF%BC%9D0%EF%BC%8C%E8%AF%95%E6%B1%82%EF%BC%88x%EF%BC%8By%EF%BC%89z%E7%9A%84%E5%B9%B3%E6%96%B9%E7%9A%84%E5%80%BC%E3%80%822.%E5%BD%93a+%EF%BC%9D%EF%BC%8D0.2%2Cb%EF%BC%9D0.04%E6%97%B6%EF%BC%8C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F72%EF%BC%8F73%EF%BC%88a%26sup2%3B-b%EF%BC%89-78%EF%BC%8F79%282a%EF%BC%8B10b%29-1%EF%BC%8F4%28a%EF%BC%8Bb%29%E7%9A%84%E5%80%BC%E3%80%823.%E8%8B%A5a%EF%BC%9D25%2Cb%EF%BC%9D-3%2C%E8%AF%95)
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