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$x$趋近于0时,MMA画错了?

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isee posted 2019-4-18 23:37 |Read mode
Last edited by isee 2019-4-18 23:47Plot[Sqrt[1 - x^2]/Log10[Abs[x]], {x, -1, 1}]

$x$趋近于0时,不应该是零么?
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kuing posted 2019-4-18 23:58
应该是那个地方太尖了,尖到需要非常大的取点数量才能画得上去,我试了加上 PlotPoints -> 10000 才进去了一点。也可能跟它内部作图的算法有关,另外,用几何画板出来的也差不多是这种样子

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original poster isee posted 2019-4-19 00:07
回复 2# kuing

有些道理,跟点的多少肯是有些关系了,多半是了。

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