Integration by parts of (e^x)(cos x)
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0:00 - 0:03让我们看一看我们可不可以用分部积分
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0:03 - 0:09来求出e^xcosxdx的反导数。
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0:09 - 0:11无论什么时候我们讨论分部积分，
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0:11 - 0:13我们一直说，这些函数中的哪一个--
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0:13 - 0:15我们取两个的积--
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0:15 - 0:18这些函数的哪一个，x或者cosx，
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0:18 - 0:20如果我要取它的导数，会变得更简单？
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0:20 - 0:22在这个情况下这两个都不会变得更简单。
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0:22 - 0:24当我取它们的反导数时
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0:24 - 0:26它们都没有变得更离谱得复杂。
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0:26 - 0:29那么这里，它是某种
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- Title:
- Integration by parts of (e^x)(cos x)
- Description:
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more » « less
- Video Language:
- English
- Team:
Khan Academy
- Duration:
- 07:16
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) | |
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) | |
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) | |
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) | |
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) | |
|
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katherinexu edited Chinese, Simplified subtitles for Integration by parts of (e^x)(cos x) |