华友帖子论点辩论中出现各种逻辑问题,非常好奇这些活跃华友的水平,故此,自己给出一道非常简单的数学题,只要学过微积分应该都能给出答案,这些答案可以当作一个过滤器,节省大家以后看帖子的时间,图片里面的 i 是一个整数,对应于各位发帖的楼层,回答例子格式如下, 你目前的层数(其他网友没选过的), 答案; i = ?, ? 例如 i = 0,0.
Opportunities for PhD research are available in a wide range of topics in Mathematical Logic. For some of the available areas of possible PhD research see the current Mathematical Logic research areas . ... Students may enter our graduate programme in Mathematical Logic by initially taking our taught M.Sc. UQ
回复 34楼chopinor的帖子 I am not using my pad now. Sorry that I do not have Chinese input on my labtop. The solution is \pi, which needs to use a little complex calculus knowledge. You can review your math textbook to check the solution. Repeat it again. I am not trying to use a hard math problem for testing your knowledge. I would like to use an entry-level calculus problem to see the level here.
回复 34楼chopinor的帖子 I am not using my pad now. Sorry that I do not have Chinese input on my labtop. The solution is \pi, which needs to use a little complex calculus knowledge. You can review your math textbook to check the solution. Repeat it again. I am not trying to use a hard math problem for testing your knowledge. I would like to use an entry-level calculus problem to see the level here. Aang_Avatar 发表于 2020-10-04 19:22
回复 35楼noghsot_1948的帖子 Yes, it is true that this is new ID. I do not know why you want to highlight it. Further, I do not know why it relates to the question we are discussing. I feel confused why you want to use new ID to tag others. To be polite. I can answer your question as the following. 1, At the beginning, when the ice block is floating, the buoyancy equals to the total gravity force of the ice block and the nail. Therefore, you can list the equation. I am not to formulate the equation here to save my time. Based on the density of nail, which is larger than water, the water level will decrease when the ice block has fully melted. 2, Again, I do not understand why this question is related to the question we are discussing. I do not want to waste my time to answer this question.
回复 36楼crazyeater的帖子 I see your point. But as what I said, this problem is to test the level. You can submit one interesting question in a new post, which we can discuss there. Happy to discuss.
回复 38楼chopinor的帖子 No, I did not want to tag others. You know there are some obvious logic issues showing up. I do not want to waste time on those discussions. I do not care who they are. They can believe in what they like. If the discussion is logistical and smooth, it can help me. Otherwise, it is just a waste of time. Yes, they are many solutions to one question. I just showed one way to do it. It is also nice to use double integral.
回复 35楼noghsot_1948的帖子 Yes, it is true that this is new ID. I do not know why you want to highlight it. Further, I do not know why it relates to the question we are discussing. I feel confused why you want to use new ID to tag others. To be polite. I can answer your question as the following. 1, At the beginning, when the ice block is floating, the buoyancy equals to the total gravity force of the ice block and the nail. Therefore, you can list the equation. I am not to formulate the equation here to save my time. Based on the density of nail, which is larger than water, the water level will decrease when the ice block has fully melted. 2, Again, I do not understand why this question is related to the question we are discussing. I do not want to waste my time to answer this question. Aang_Avatar 发表于 2020-10-04 19:41
这一定是说我了lol 自觉认领。 承认我确实不喜欢数学,微积分也学的一般(而且很奇怪地不喜欢积分,脑子里总想用derivative反推lol)看主楼的时候我就扫了一眼题目根本没想过脑子算,直接就回复了。因为我不觉得楼主用简单微积分可以test the level的这个assumption成立,也就不想花一丁点脑力follow楼主的rule(太懒了怪我)。楼主也没有给出“level"的定义——学历,知识背景,态度,etc?我首先盲猜一个肯定不是学历,比如我这样的,虽然有post graduate engineering school 学历但是数学不过关不说还懒得动脑,不就fail了楼主的test到底是啥level还请楼主明示(话说,表义不清是逻辑好的表现吗?)
回复 43楼noghsot_1948的帖子 1, There are some. Let us focus more on the questions they are posted and the discussions they joined. 2, You get to the STRAW MAN logical fallacy. Let us not exaggerate the question or misrepresent the question. It is just a math question. Everyone is welcome to discuss. Even someone does not know, it does not harm to learn from others. 3, You are asking the question to identify the origin where I am from. It does not relate to this topic. It is a RED HERRING fallacy.
Opportunities for PhD research are available in a wide range of topics in Mathematical Logic. For some of the available areas of possible PhD research see the current Mathematical Logic research areas . ... Students may enter our graduate programme in Mathematical Logic by initially taking our taught M.Sc. UQ EvenOdd 发表于 2020-10-04 18:19
回复 44楼blindbox的帖子 The goal is not to see the solution. It is about the way you are thinking. Like the discussion I had before, there are so many solutions to one question. The one you are discussing here is also reasonable. Yes, I need to first define what kind of level I would like to see, which I did not describe clearly. It is my fault. To make it clear, I would like to see the level how you think. You know it is challenging to use one question to test it. While the one we are discussing can show something, it does not mean ALL. I do not think it is a bad thing. You can still learn something from this question, right?
<图片里面的 i 是一个整数,对应于各位发帖的楼层,回答例子格式如下,你目前的层数(其他网友没选过的), 答案; i = ?, ? 例如 i = 0,0.> The above appears very hard to comprehand/ understand, alomost impposible to follow. Perhaps just for people like me with limited intelligence! Better written again in English. Plus another simple example!
imo, it would purely depend on how you made and place the metal pin inside the ice cube, as the ice cube could be produced by assembling and matching two halves while each half preparing a cavity before assembling. imo,这完全取决于您如何将金属销钉放在冰块中,因为冰块可以通过组装和匹配两半而制造,而每半在组装之前准备一个空腔。
imo, it would purely depend on how you made and place the metal pin inside the ice cube, as the ice cube could be produced by assembling and matching two halves while each half preparing a cavity before assembling. imo,这完全取决于您如何将金属销钉放在冰块中,因为冰块可以通过组装和匹配两半而制造,而每半在组装之前准备一个空腔。
Actually, 5 years is just too long! 其实5年太长了! Perhaps 5 months or 5 weeks, if not 5 days nor 5 hours! 可能是5个月或5周,如果不是5天或5个小时! Besides, our advanced maths I and II for two half-years were close book exam, however advanced maths III next year was open book exam. Took just 5 minutes to forget everything! 此外,我们为期两个半年的高级数学I和II是封闭书本考试,而明年的高级数学III是开放书本考试。 只花了5分钟就忘记了一切!
Perhaps a better way here: 也许更好的方法是: Q https://www.afr.com/technology/tech-giant-targets-australia-for-1m-a-year-social-good-push-20201002-p561jt Global enterprise technology giant SAP has committed to invest at least 5 per cent of its possible expenses with social enterprises by 2025, with Australia one of the first countries to sign up for the idea. As well as social enterprises (companies that have specified social-good objectives as their primary purpose), SAP will commit an additional 5 per cent of spending to diverse businesses run by minority groups. 全球企业技术巨头SAP承诺到2025年将其可能开支的至少5%投资于社会企业,而澳大利亚则是最早接受该想法的国家之一。 除了社会企业(已将社会公益目标指定为主要目的的公司)之外,SAP还将额外支出的5%用于少数群体经营的各种业务。 UQ
看到论坛中左一个博士又一个 top, 给人一种高高在上的感觉,很难想象连一道最基础的微积分都不会
但是Top 或者博士,并不都需要微积分很牛。
我们的孩子能做到微积分很熟练就太好了。
如果是上过大学的肯定算过类似的,只需要最基础的微积分知识即可
-i到i,你别被根号唬了
棒棒的
不需要翻公式,这里面有用到一点点逻辑常识仅此而已,如果是靠翻公式没有必要出这一道题,本人很好奇华友的水平
T同意
i^2 pi + 1/3 i ^ 3
i 是sqr(-1)吗
这题需要的是动脑子,不是去死记硬背,微积分是大学通用课程,很难想象博士或 top 出身连最基础都不会,可信度很低
逻辑注重的是推理,一步一步逻辑严格。数学最考究的是逻辑功底。因为某种性质可以generalization, 所以可以一眼可以辨识出结果。这跟平时讨论问题一样,随意猜测对于辩论没有丝毫意义,逻辑严格才能对得住大家的时间
只会吵架非常浪费大家时间,这题仅仅为大家做一个参考,了解下华友的初步水平,节省自己看帖的时间
是吧是吧!很容易跟虚根混淆。 暴露了出题者学过初等微积分,但是可能没学过复数?
这题本身就不是考验难度,只是检测下水平,就算是虚根,也可以算出来,并不一定要标准答案,只要给出的答案一眼看过去是懂的即可
不太对吧 这个函数前半部分是奇函数,后面的只有第一项是啊 题目看着挺唬人,其实真正要做的只有i * pi + x ^ 2 这两个需要去做微积分 这两个的微积分不用翻书吧,应该还是记得的
你的逻辑有问题,暴露出,能不能不要 YY,另外题中已给出i 是整数
转发给儿子了,他能做出来,我不一定搞得出来
应该是你的逻辑有问题,我没有一句话说过做的出这道题就代表逻辑好,首先这道题考察的不是难度也不是死记硬背的做题方法,而是应用逻辑中重要的 generalization。其次已经有网友给出清晰的思路,我不需要正确的答案,过程同样可以了解对方是否知道。再次你不知道,看下别人的思维过程,要还是看不懂,那是你的水平问题。出这题就是好奇华友的水平,仅供大家参考而已。
我也知道了我不知道我也不知道我知道了我也不知道我知道了我也知道了我不知道.
他测的不是逻辑是学历
Q Best PhD Degrees in Logic 2020/2021 www.phdstudies.com › PhD
Candidates for a PhD in Logic will be required to develop an area of specialization in which to conduct research leading to a dissertation that must be defended in ...
Opportunities for PhD research are available in a wide range of topics in Mathematical Logic. For some of the available areas of possible PhD research see the current Mathematical Logic research areas . ... Students may enter our graduate programme in Mathematical Logic by initially taking our taught M.Sc.
UQ
你这太简单,问你个吧
sin(x)/x -inf and inf 的积分吧
楼主新ID,考你道题吧,初中物理水平:
一个杯子,里面了半杯水,杯子里面有个冰块飘着,冰块里面包着一块铁钉。
冰化了,水面是上升还是下降,还是不动呢?
或者再一个知识背景题,在中国大陆,一个重点高中学生,什么情况下可以提前一年进入清华北大这样的学校,念本科呢?————如果你在中国大陆重点高中念过,别告诉我你不知道。。。
最大的逻辑问题就是我跟你说一件事,你却非要东拉西扯些别的。不过我同意你的观点,这贴确实证明了华人上有些发贴人没有逻辑。
I am not using my pad now. Sorry that I do not have Chinese input on my labtop.
The solution is \pi, which needs to use a little complex calculus knowledge. You can review your math textbook to check the solution.
Repeat it again. I am not trying to use a hard math problem for testing your knowledge. I would like to use an entry-level calculus problem to see the level here.
这题我也没打算check啥啊,作业题而已,这里轮子虽然多,但是也不是你想的都是轮子
还有你搞麻烦了,这个double integral就可以用不上啥复变
Yes, it is true that this is new ID. I do not know why you want to highlight it. Further, I do not know why it relates to the question we are discussing. I feel confused why you want to use new ID to tag others.
To be polite. I can answer your question as the following.
1, At the beginning, when the ice block is floating, the buoyancy equals to the total gravity force of the ice block and the nail. Therefore, you can list the equation. I am not to formulate the equation here to save my time. Based on the density of nail, which is larger than water, the water level will decrease when the ice block has fully melted.
2, Again, I do not understand why this question is related to the question we are discussing. I do not want to waste my time to answer this question.
I see your point. But as what I said, this problem is to test the level. You can submit one interesting question in a new post, which we can discuss there. Happy to discuss.
No, I did not want to tag others. You know there are some obvious logic issues showing up. I do not want to waste time on those discussions. I do not care who they are. They can believe in what they like. If the discussion is logistical and smooth, it can help me. Otherwise, it is just a waste of time.
Yes, they are many solutions to one question. I just showed one way to do it. It is also nice to use double integral.
1、这个平台上有很多各种带着任务来挑事的人群,非常令人反感,其中不可否则新ID中很多都是。而且新ID很喜欢挖坑和引战。
2、我很不喜欢您使用一个微积分题目的方式来区分人群的方式,因为这代表着背后一种我很熟悉,但很不喜欢的思维模式。 从小处说,所有的文科生别参与讨论了,因为不具备“逻辑思维”能力, 往大处说,所有没有念过本科,或者没有学过ap 微积分的人别说话了,因为不具备“逻辑思维”能力。 如果沿着个这种思维方式,我们是否可以讲:英语不好的人别投票了,因为你英语不好; 身体不健康的人别活了,因为你浪费社会资源。。。 当然,您有权用这种方式来决定您喜欢看什么,我支持你的权力,我也有权表达出我对这件事情的看法。
3、后面的问题,只不过想判断出来,您是在大陆长大的,还是美国长大的,因为一般在美国长大的孩子,不太会有类似的思维方式。
这一定是说我了lol 自觉认领。 承认我确实不喜欢数学,微积分也学的一般(而且很奇怪地不喜欢积分,脑子里总想用derivative反推lol)
<故此,自己给出一道非常简单的数学题,>
1, There are some. Let us focus more on the questions they are posted and the discussions they joined.
2, You get to the STRAW MAN logical fallacy. Let us not exaggerate the question or misrepresent the question. It is just a math question. Everyone is welcome to discuss. Even someone does not know, it does not harm to learn from others.
3, You are asking the question to identify the origin where I am from. It does not relate to this topic. It is a RED HERRING fallacy.
How did you reach that conclusion? Just based on your imagination. You logic is so good. Good for you.
https://en.wikipedia.org/wiki/Stoic_logic
https://ericsiggyscott.wordpress.com/2018/03/04/what-is-stoic-logic/
https://www.historyoflogic.com/logic-stoics.htm
The goal is not to see the solution. It is about the way you are thinking. Like the discussion I had before, there are so many solutions to one question. The one you are discussing here is also reasonable. Yes, I need to first define what kind of level I would like to see, which I did not describe clearly. It is my fault. To make it clear, I would like to see the level how you think. You know it is challenging to use one question to test it. While the one we are discussing can show something, it does not mean ALL. I do not think it is a bad thing. You can still learn something from this question, right?
The above appears very hard to comprehand/ understand, alomost impposible to follow. Perhaps just for people like me with limited intelligence!
Better written again in English. Plus another simple example!
imo, it would purely depend on how you made and place the metal pin inside the ice cube, as the ice cube could be produced by assembling and matching two halves while each half preparing a cavity before assembling. imo,这完全取决于您如何将金属销钉放在冰块中,因为冰块可以通过组装和匹配两半而制造,而每半在组装之前准备一个空腔。
法学博士,医学博士,历史学博士……哭了
这题LZ答对了,你想多了,最简单的浮力定律。。。
Ok. How about only a small part of the pin is attached to the ice cube? Just for fun.
这道题是很多年前,去参加全国出题时候弄的一套题,冰里面空气,煤油,铁钉,是一个系列。。。 原题应该是以前一套老毛子/老美的题,做了简化弄出来的。 后来好像成为例题了。
But there is still a possibility that a major part of the small metal pin is resting outside the large-size ice cube before melting. ?
同意啊,不知道楼主是不是带任务上来发帖的。要知道这里的大多数网友都是眼睛雪亮的!!!
楼主是哪里来的奇葩,或者本身还是学生?绝大多数理工科博士的日常工作中,根部不需要用到微积分,而且微积分从来和逻辑8竿子打不着。楼主的贴纸,暴露了自己的逻辑硬伤。
Actually, 5 years is just too long! 其实5年太长了!
Perhaps 5 months or 5 weeks, if not 5 days nor 5 hours! 可能是5个月或5周,如果不是5天或5个小时!
Besides, our advanced maths I and II for two half-years were close book exam, however advanced maths III next year was open book exam. Took just 5 minutes to forget everything! 此外,我们为期两个半年的高级数学I和II是封闭书本考试,而明年的高级数学III是开放书本考试。 只花了5分钟就忘记了一切!
Perhaps a better way here: 也许更好的方法是:
Q https://www.afr.com/technology/tech-giant-targets-australia-for-1m-a-year-social-good-push-20201002-p561jt
Global enterprise technology giant SAP has committed to invest at least 5 per cent of its possible expenses with social enterprises by 2025, with Australia one of the first countries to sign up for the idea.
As well as social enterprises (companies that have specified social-good objectives as their primary purpose), SAP will commit an additional 5 per cent of spending to diverse businesses run by minority groups.
全球企业技术巨头SAP承诺到2025年将其可能开支的至少5%投资于社会企业,而澳大利亚则是最早接受该想法的国家之一。
除了社会企业(已将社会公益目标指定为主要目的的公司)之外,SAP还将额外支出的5%用于少数群体经营的各种业务。
UQ
学过傅里叶变换的,看到sin(x)/x就会直接想到rectangular。。频率为0的FT值就是那个积分
哈哈,想起前些天我国内的同学发的朋友圈,说习大大指示了微积分的重要性,现在各个事业单位都要考微积分,但苦于没有人教。
lz也在吸刁小小的屁?不但自己闻了吸,还对别人说,你们如果不闻这个香屁,你们都不配讲话。
哈哈哈哈 我说怎么讨论微积分. 很想扔个马尔可夫链给楼主做.