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[函数] 武汉市二月调考一三角题答案不知是不是错的

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hongxian posted 2014-2-26 10:32 |Read mode
Last edited by hongxian 2014-2-26 10:38 截图00.jpg


截图01.jpg

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战巡 posted 2014-2-26 10:47
回复 1# hongxian

看起来没什么问题啊
$a=\frac{\pi}{2}, b=\frac{\pi}{2}+\frac{28\pi}{3}$的时候确实中间包含20个零点

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original poster hongxian posted 2014-2-26 11:01
回复 2# 战巡


    主要是想题目中是说至少有20个零点,
好像长度为$\dfrac{28\pi}{3}$时不一定有20个零点,有可能只有19个零点

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战巡 posted 2014-2-26 11:36
回复 3# hongxian


它没说对任意a都满足条件啊.......

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kuing posted 2014-2-26 12:15
回复 3# hongxian

这下汉字不是打进来了么……

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original poster hongxian posted 2014-2-26 12:17
回复 5# kuing

又能打进来了,有可能是我的电脑的问题

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original poster hongxian posted 2014-2-26 12:18
回复 2# 战巡

这样看来是我理解错了!

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