把题目列出来。完全不明白你在说什么。我第一个反应和楼下一样。。
追答y'就是y对某一个变量的导数。这个变量可以是x,u,v,名字任意起。可以写作dy/dx,dy/du,dy/dv,简略一点就是y'。
什么叫没有dx怎么算....y'=3,也没有dx。你会算嘛?
追问![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0e2442a7d933c8953a705b41d81373f0820200fa?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
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哥,你算一个
追答暂时做了第一小问。。有时间再做下面的。不过第一问做好了后面很快的。
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....当我刚刚的没发...那是草稿内容。打错了
追问这个我会啊。我主要是问第三个问。
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追答我明白了。这是求微分方程。
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