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    <title>郝问题_eepowerbbs - 数学</title>
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    <description>Latest 20 threads of 数学</description>
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      <title>每日一积</title>
      <link>https://www.eepowerbbs.cn/thread-16389-1-1.html</link>
      <description><![CDATA[每日一积你就会成为大佬]]></description>
      <category>数学</category>
      <author>冉林浩_270001</author>
      <pubDate>Sat, 04 Apr 2026 09:28:01 +0000</pubDate>
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      <title>概率论数理统计</title>
      <link>https://www.eepowerbbs.cn/thread-16139-1-1.html</link>
      <description><![CDATA[如图，DYi能不能用下面的算法求？如果能，那么Xi和X的协方差是多少，怎么算]]></description>
      <category>数学</category>
      <author>WBB23333_270109</author>
      <pubDate>Thu, 26 Mar 2026 12:44:38 +0000</pubDate>
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    <item>
      <title>特征值</title>
      <link>https://www.eepowerbbs.cn/thread-13533-1-1.html</link>
      <description><![CDATA[为什么这个实对称矩阵的特征值只能是1和-1]]></description>
      <category>数学</category>
      <author>菜狗_260290</author>
      <pubDate>Tue, 18 Nov 2025 09:37:45 +0000</pubDate>
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    <item>
      <title>拉格朗日方程</title>
      <link>https://www.eepowerbbs.cn/thread-12832-1-1.html</link>
      <description><![CDATA[友友们有没有什么解拉格朗日方程的好方法吗，感觉每次凑数字太难受了]]></description>
      <category>数学</category>
      <author>菜狗_260290</author>
      <pubDate>Sun, 02 Nov 2025 16:28:16 +0000</pubDate>
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    <item>
      <title>解拉格朗日方程有什么好用的方法吗</title>
      <link>https://www.eepowerbbs.cn/thread-12378-1-1.html</link>
      <description><![CDATA[求助，请问大家，解拉格朗日方程有什么方法吗]]></description>
      <category>数学</category>
      <author>马铃薯_260569</author>
      <pubDate>Thu, 23 Oct 2025 14:13:41 +0000</pubDate>
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    <item>
      <title>概率论听哪位老师的课呀</title>
      <link>https://www.eepowerbbs.cn/thread-11954-1-1.html</link>
      <description><![CDATA[想问一下大家，概率论听哪位老师的呀]]></description>
      <category>数学</category>
      <author>马铃薯_260569</author>
      <pubDate>Wed, 15 Oct 2025 01:41:04 +0000</pubDate>
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    <item>
      <title>二阶导数推导</title>
      <link>https://www.eepowerbbs.cn/thread-11487-1-1.html</link>
      <description><![CDATA[这个难道不可以推出二阶导数在1的位置是0吗，那这样不就没有极值点]]></description>
      <category>数学</category>
      <author>菜狗_260290</author>
      <pubDate>Fri, 03 Oct 2025 15:03:05 +0000</pubDate>
    </item>
    <item>
      <title>行列式</title>
      <link>https://www.eepowerbbs.cn/thread-11238-1-1.html</link>
      <description><![CDATA[这部是什么意思]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sat, 27 Sep 2025 09:51:50 +0000</pubDate>
    </item>
    <item>
      <title>一类线积分</title>
      <link>https://www.eepowerbbs.cn/thread-11219-1-1.html</link>
      <description><![CDATA[求助绿框框这里是怎么化的，我写了一下自己化不出来是哪里出错了]]></description>
      <category>数学</category>
      <author>xt._260585</author>
      <pubDate>Sat, 27 Sep 2025 03:57:21 +0000</pubDate>
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    <item>
      <title>无穷级数</title>
      <link>https://www.eepowerbbs.cn/thread-10973-1-1.html</link>
      <description><![CDATA[咋得出这个的]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sun, 21 Sep 2025 15:43:30 +0000</pubDate>
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    <item>
      <title>无穷级数</title>
      <link>https://www.eepowerbbs.cn/thread-10972-1-1.html</link>
      <description><![CDATA[没看懂]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sun, 21 Sep 2025 15:27:36 +0000</pubDate>
    </item>
    <item>
      <title>无穷级数</title>
      <link>https://www.eepowerbbs.cn/thread-10971-1-1.html</link>
      <description><![CDATA[X=0时 S2不是等于0嘛]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sun, 21 Sep 2025 14:39:57 +0000</pubDate>
    </item>
    <item>
      <title>无穷级数</title>
      <link>https://www.eepowerbbs.cn/thread-10962-1-1.html</link>
      <description><![CDATA[为啥在(-3,3)绝收]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sun, 21 Sep 2025 11:45:04 +0000</pubDate>
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    <item>
      <title>无穷级数</title>
      <link>https://www.eepowerbbs.cn/thread-10959-1-1.html</link>
      <description><![CDATA[举的这个例子不是发散的嘛 也不是收敛的呀]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Sun, 21 Sep 2025 10:43:36 +0000</pubDate>
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    <item>
      <title>二重积分</title>
      <link>https://www.eepowerbbs.cn/thread-10879-1-1.html</link>
      <description><![CDATA[为啥g(y-x)还是一样 是根据什么性质么]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Fri, 19 Sep 2025 12:11:45 +0000</pubDate>
    </item>
    <item>
      <title>积分</title>
      <link>https://www.eepowerbbs.cn/thread-10874-1-1.html</link>
      <description><![CDATA[咋积的]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Fri, 19 Sep 2025 09:50:03 +0000</pubDate>
    </item>
    <item>
      <title>比较大小</title>
      <link>https://www.eepowerbbs.cn/thread-10864-1-1.html</link>
      <description><![CDATA[横线那个是什么意思没看懂]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Fri, 19 Sep 2025 08:26:41 +0000</pubDate>
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    <item>
      <title>三角函数</title>
      <link>https://www.eepowerbbs.cn/thread-10581-1-1.html</link>
      <description><![CDATA[下面这个咋由上面得来的]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Fri, 12 Sep 2025 19:07:45 +0000</pubDate>
    </item>
    <item>
      <title>积分</title>
      <link>https://www.eepowerbbs.cn/thread-10550-1-1.html</link>
      <description><![CDATA[这个咋积的]]></description>
      <category>数学</category>
      <author>A5166962_260596</author>
      <pubDate>Fri, 12 Sep 2025 07:33:52 +0000</pubDate>
    </item>
    <item>
      <title>谁能帮我算一下，怎么也算不对</title>
      <link>https://www.eepowerbbs.cn/thread-10458-1-1.html</link>
      <description><![CDATA[1]]></description>
      <category>数学</category>
      <author>赵瑞涛_260148</author>
      <pubDate>Wed, 10 Sep 2025 03:14:54 +0000</pubDate>
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