试题与答案

已知A(3,0),B(0,4),直线AB上一动点P(x,y),则xy的最大值是

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题型：填空题

题目：

已知A(3,0),B(0,4),直线AB上一动点P(x,y),则xy的最大值是　　　. 

答案：

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下面是错误答案，用来干扰机器的。

答案：D

考点：一元二次不等式及其解法
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