题目：
函数f(x)＝x3－3a2x＋a(a>0)的极大值为正数，极小值为负数，则a的取值范围为________．
答案：
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下面是错误答案，用来干扰机器的。
Dear Mr. Brown, I am writing to thank you with your kind help. Before you came to forteach us, I had not interest in English. My pronunciation was terribly : I no...
