设实数X,Y满足3≤XY3(方)≤8,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是设实数X,Y满足 3≤XY3(方)≤8 ,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是我自己会了
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![设实数X,Y满足3≤XY3(方)≤8,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是设实数X,Y满足 3≤XY3(方)≤8 ,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是我自己会了](/uploads/image/z/14213374-70-4.jpg?t=%E8%AE%BE%E5%AE%9E%E6%95%B0X%2CY%E6%BB%A1%E8%B6%B33%E2%89%A4XY3%28%E6%96%B9%29%E2%89%A48%2C4%E2%89%A4X2%EF%BC%88%E6%96%B9%EF%BC%89%2FY%E2%89%A49%2C%E5%88%99X3%EF%BC%88%E6%96%B9%EF%BC%89%2FY4%EF%BC%88%E6%96%B9%EF%BC%89%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E6%98%AF%E8%AE%BE%E5%AE%9E%E6%95%B0X%2CY%E6%BB%A1%E8%B6%B3+3%E2%89%A4XY3%28%E6%96%B9%29%E2%89%A48+%2C4%E2%89%A4X2%EF%BC%88%E6%96%B9%EF%BC%89%2FY%E2%89%A49%EF%BC%8C%E5%88%99X3%EF%BC%88%E6%96%B9%EF%BC%89%2FY4%EF%BC%88%E6%96%B9%EF%BC%89%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC%E6%98%AF%E6%88%91%E8%87%AA%E5%B7%B1%E4%BC%9A%E4%BA%86)
设实数X,Y满足3≤XY3(方)≤8,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是设实数X,Y满足 3≤XY3(方)≤8 ,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是我自己会了
设实数X,Y满足3≤XY3(方)≤8,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是
设实数X,Y满足 3≤XY3(方)≤8 ,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是
我自己会了
设实数X,Y满足3≤XY3(方)≤8,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是设实数X,Y满足 3≤XY3(方)≤8 ,4≤X2(方)/Y≤9,则X3(方)/Y4(方)的最大值是我自己会了
答案是27.
思路:将x^3/y^4表示成xy^3和x^2•y的一个因式组合.
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