NAI_GAI_

Hello world!

[NAI_GAI_ @GelardYee]

Good morning,I’m back!

[原神（Genshin）公式 @Genshin_7]

【壁紙配布】
Webイベント「移ろう光、影を写して」の壁紙を配布します！
ぜひご利用ください！

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#原神 #Genshin

[NAI_GAI_ @GelardYee]

@ChoiSehwan_ow You deserve better! Fighting!

[NAI_GAI_ @GelardYee]

😭😭😭

[Guangzhou Charge @GZCharge]

It's been a long journey, but not once did this phenomenal talent stop striving towards greatness.

There will never be enough time to say how much we appreciate and treasure everything you've given us over the years and the experiences we shared. Thank you, ChoiSehwan.

#020UP

[Overwatch Esports @OW_Esports]

TODAY'S THE DAY 🤩

#OWL2023 Midseason Madness has officially ARRIVED! Join us for WatchPoint at 6PM PT as we kick off the weekend!

📺 https://t.co/tbTGBrUfiE

[Overwatch @PlayOverwatch]

A journey full of rewards awaits you in #Overwatch2 Season 5✨

[Overwatch Esports @OW_Esports]

#OWL2023 Midseason Madness starts

TOMORROW
TOMORROW
TOMORROW
TOMORROW

[Overwatch @PlayOverwatch]

Story Missions 💥
New co-op mode 👥
New Support hero ⛑️
And more 👀

Get ready for all-new ways to play in #Overwatch2: Invasion, our biggest content drop yet, coming Aug 10 ✨

[Overwatch @PlayOverwatch]

Game Director @aaronkellerow is back with a preview of balance changes coming to #Overwatch2 in Season 5.

👑 Updates to Junker Queen
🌸 Buffs to Lifeweaver
💥 Changes to one-shots & crowd control abilities

Read more 👉 https://t.co/NrEksPwy2J

[Hangzhou Spark @Hangzhou_Spark]

A clean push and a clean sweep! #OWL2023 | #LITITUP | #SparkIt | #HangzhouSpark

[Britney Stan 🌹 @BritneyTheStan]

Britney Spears’ attorney Mat Rosengart announces that her father has been suspended today #FreeBritney

[G-Eazy @G_Eazy]

SEPTEMBER 24

[NAI_GAI_ @GelardYee]

@zlj517 感觉很美味���很丰盛

[NAI_GAI_ @GelardYee]

I’ll make some interesting video about Grand Auto Theft V on this platform.:)
Welcome to follow me and subscribe!

[NAI_GAI_ @GelardYee]

Good morning,I’m back!

[NAI_GAI_ @GelardYee]

@AnhuiTravel @zlj517 好家伙！看到自己的故乡的花了，更想家了😭

[NAI_GAI_ @GelardYee]

当然 这道题用参数方程也可以做

[NAI_GAI_ @GelardYee]

开个数学学习楼
记录一下平时冲浪看到的琐碎知识点，方便以后复习😅
先自我介绍一下
本人菜鸟（大佬别来这里找自信😅）
就读于某双非大学数学学院拔尖创新班…
先说这么多，这个楼我只设置了我自己可以回复，喷子杠精就别来了😅😅😅

[NAI_GAI_ @GelardYee]

【关于旋轮线以及y=sinx这类曲线绕y轴旋转所得旋转体体积的求法】
书上例题求的是旋轮线，给的是参数方程，那必然套参数方程形式的公式，而且关于y轴是体积相剪，就不必多说了。
再说说作业里碰到的y=sinx关于y轴旋转
你会发现例如图2的问题
解决方案如图3
好吧 果然菜才是原罪

[NAI_GAI_ @GelardYee]

【关于行列式=特征值乘积的证明】
设有一个n*n阶矩阵A，他的特征多项式|λE-A|所对应的特征根依次为λ1，λ2，…，λn.
｛则有detA=λ1*λ2*…*λn｝
证明见图吧���得打字了，还有从约当阵角度的考虑

[NAI_GAI_ @GelardYee]

【关于两个常见的病态函数R（x）和D（x）】
p1两个病态函数定义和具体图像用来来辅助理解
①黎曼函数R（x）连续性与可导性放在p2
②狄利克雷函数D（x）不连续也不可导
因为在定义域内每一个点处的任意邻域内都有取值为0的有理点和取值为1的无理点。根据稠密性，必然做不到连续，因此也就不可导。