1.若单项式-6x^2y^m与1/3x^n-1y^3是同类项,那么这两个单项式的积是多少?2.计算:(-a^n+2)^3·(-4ab^n+3)^2=?8^2·4^1997·(-0.25)^2001=?(-0.25)^57·(-2)^114=3.已知a2+a-3=o,那么a2(a+4)的值是 4.计算:-x(x^2+2x-3)-x^2(x+1)+3
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![1.若单项式-6x^2y^m与1/3x^n-1y^3是同类项,那么这两个单项式的积是多少?2.计算:(-a^n+2)^3·(-4ab^n+3)^2=?8^2·4^1997·(-0.25)^2001=?(-0.25)^57·(-2)^114=3.已知a2+a-3=o,那么a2(a+4)的值是 4.计算:-x(x^2+2x-3)-x^2(x+1)+3](/uploads/image/z/6114046-22-6.jpg?t=1.%E8%8B%A5%E5%8D%95%E9%A1%B9%E5%BC%8F-6x%5E2y%5Em%E4%B8%8E1%2F3x%5En-1y%5E3%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E9%82%A3%E4%B9%88%E8%BF%99%E4%B8%A4%E4%B8%AA%E5%8D%95%E9%A1%B9%E5%BC%8F%E7%9A%84%E7%A7%AF%E6%98%AF%E5%A4%9A%E5%B0%91%3F2.%E8%AE%A1%E7%AE%97%EF%BC%9A%28-a%5En%2B2%29%5E3%C2%B7%28-4ab%5En%2B3%29%5E2%3D%3F8%5E2%C2%B74%5E1997%C2%B7%28-0.25%29%5E2001%3D%3F%EF%BC%88-0.25%29%5E57%C2%B7%28-2%29%5E114%3D3.%E5%B7%B2%E7%9F%A5a2%2Ba-3%3Do%2C%E9%82%A3%E4%B9%88a2%28a%2B4%29%E7%9A%84%E5%80%BC%E6%98%AF+4.%E8%AE%A1%E7%AE%97%EF%BC%9A-x%28x%5E2%2B2x-3%29-x%5E2%28x%2B1%29%2B3)
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