100分求一道数学题,When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre,the yield decreases by 3 oranges per tree.Express the total yield of oranges per acre,Y ,as a function of the number of

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100分求一道数学题,When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre,the yield decreases by 3 oranges per tree.Express the total yield of oranges per acre,Y ,as a function of the number of
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100分求一道数学题,When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre,the yield decreases by 3 oranges per tree.Express the total yield of oranges per acre,Y ,as a function of the number of
100分求一道数学题,
When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre,the yield decreases by 3 oranges per tree.Express the total yield of oranges per acre,Y ,as a function of the number of trees planted per acre,x,if x \x15 30.

100分求一道数学题,When 30 orange trees are planted per acre each tree yields 150 oranges For each additional tree per acre,the yield decreases by 3 oranges per tree.Express the total yield of oranges per acre,Y ,as a function of the number of
每亩种30棵树时,每棵树产150个,每多种一棵树则每棵树减产3个,试将一亩地的总产量Y表示成该地所种树X棵的函数,其中X>=30
y=[150-3*(x-30)]*x=-3x^2+240x

当30个橘子树种植每亩产量150橘子树每增加树每英亩的产量减少了3，柑橘树。表达的总产量的橘子每英亩，你，作为一个功能的种植数量每英亩，××30，如果。

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