Nơi chia sẻ tri thức, kết nối cộng đồng và giải đáp mọi thắc mắc từ A–

Monday, 11/05/2026

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On or In the world? : r/EnglishLearning

We say that something is in the world, or on Earth/the earth. "On the world" is not correct, unless you're using another word that requires "on" ...Read more

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Fiat X1/9 by Bertone : r/WeirdWheels

Four cylinder 1300cc engine with a four-speed gearbox. Later models had the 1500cc engine and a five-speed transmission.Read more

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In the equation 1-sinx=cosx, why am I allowed to square ...

You are always allowed to square both sides of an equation, as long as you keep in mind that you might end up introducing spurious solutions.Read more

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Can someone explain rules for D/DX x^(ln(x))? : r/learnmath

There aren't any special rules; you just have to rearrange it into a form where you can use the chain rule like you usually would.Read more

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How did we learn that the integral of 1/x dx is ln(x)? These ...

The derivative of exp is proportional to it's output, while the derivative for ln is proportional to the inverse of it's input, a nice intuitive way I think ...Read more

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Can I just get into tennis for fun and casual play? : r/10s

It's a sport where you want to get better, but don't think too much about it. Better you get funnier it gets to play, but don't overthink it.Read more

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Why can't we get more of these angles? : r/tennis

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how much cultural diversity is there in your country?

There are around 180+ ethnic groups. Among the immigrants, only the Tsinoy (Chinese-Filipinos), Koreans and Indians have discernible communities ...Read more

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This is was difficult write same of this character

This is a community for people studying or teaching Chinese - or even if you're just interested in Chinese languages. Discussion of all Chinese ...Read more

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In Titanic, isn't the point that the door wouldn't hold ...

One of the most common film criticisms I hear is that at the end of Titanic there was room for both Jack and Rose on the door, meaning he didn't need to die.Read more

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Ai đó giải thích giúp tôi về Skyfall được không? (có tiết lộ ...

Tên của cha mẹ James Bond đến từ tiểu thuyết. Nó chỉ là một sự trùng hợp ngẫu nhiên.Read more

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"I still haven't received the e-mail." or ...

They are both correct and describe the same situation. “I still haven't” might be used to express impatience, depending on the tone of voice.Read more

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Cái này nghĩa là gì? : r/PhoenixSC

Thế là số i ra đời, được định nghĩa là căn bậc hai của trừ một. Tất cả những điều này để nói rằng dòng chữ Splash viết "i love you". Đây là ...Read more

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Cậu có giải được phương trình này không 128√¯e980 : r/gifs

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Does Logan have an X number like how Laura is X-23?

Laura's number is from her being the 23rd attempt to clone Logan, so it is unrelated to the Weapon-X / Weapon-Plus programs. Technically Logan is Weapon 10, ...Read more

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I really want to like tea but can't get past the taste. ...

people new to tea often start with fruit or spice blended teas, or maybe oolong or jasmine teas, which are not as leafy as blacks and greens.Read more

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What prompted you to like tea? : r/tea

I like tea because compared to other common beverages (ie coffee, carbonated water) tea doesn't come off as strong and it feels nice to have something warm.Read more

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Math Question. Can you solved it? : r/learnmath

Math Question. Can you solved it? If 12 + 22 + 32 + ………………… + 5122 = m, then 22 + 42 + 62 + 10242 is equal to: a) 4m. b) 2m. c) 3m. d) M2. e) M4.Read more

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Drinks ONLY on special occasions? : r/stopdrinking

Yes! Having alcohol on 'special' occasions reinforces that line that the media constantly pushes: that alcohol is necessary to have fun.Read more

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What does 4^1/2 mean? : r/askmath

4 1/2 is a number which, times itself, is 4. This number is 2; 2*2 = 4, so 4 1/2 = 2. x 1/2 is just another way of writing the square root.Read more

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What is everyone's place of birth? Not actual but is it the ...

It doesn't matter where you live normally or where you register the birth, the place of birth is the town the baby was born in, as recorded on ...Read more

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Làm tròn nhiệt độ chính xác thế nào nhỉ? : r/maths

Hầu hết các nhiệt độ trong dữ liệu của bạn đều được làm tròn đến số nguyên gần nhất. Vì vậy, bạn nên làm tròn kết quả trung bình đến số nguyên ...Read more

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How do you understand the saying, “cheap is expensive”?

Cheap doesn't always mean bad quality and expensive doesn't always mean good. What purchases do you think are necessary to splurge on and which ...Read more

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sin(x)+sin(3x)=0 : r/Precalculus

Find all solutions of the equation sin(x)+sin(3x)=0 which are on the interval [0,2pi). Hint: use all possible solutions and k=0, ...

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[Tiếng Việt] Sự khác nhau giữa đoạn văn và đoạn trích

Khi tớ làm bài đọc hiểu mà có câu hỏi liên quan đến một đoạn văn, thì ý nghĩa và sự khác biệt giữa "đoạn văn" (passage) và "đoạn văn" (paragraph)

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Can i put two m.2 drives into ONE m.2 slot? : r/DataHoarder

Is there some sort of expansion/extender cable to reductin or "card" or whatever that will allow me to plug two (2x) m.2 drives into only ONE m.2 slot?

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Is 2x NvME m.2 drives practical or is it an expensive ...

Many of the mobos that have 2 m.2 usually has less lanes going towards the 2nd unit. Very few have equal, if any. IMO, its as practical as you ...

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Why is this equation equal 1 / ( x + 5)? : r/learnmath

This is not an equation. It is a function. Note that the equality you described is only valid if x is not equal to -5.Read more

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I made a mistake and really regret it. How do I move ...

Take the lesson you have learned and hold it close . Let it transform you if that's what is needed . Listen to music , dance, stomp your feet, ...Read more

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How do you deal with big regrets in life? How do you not let ...

The older I get, the more I find myself having bigger, and heavier regrets. Regrets about life decisions, people I chose, people I lost, and all that.Read more

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Is driving 60 Mph faster than driving 60 Kms/h?

I live in a country that measures distance in kilometres and I've always been curious. Since miles are longer that kilometres, is 60 mph a faster speed than 60 ...Read more

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Sự khác nhau giữa một đoạn văn, một câu thơ và một khổ ...

Một đoạn văn là một khối văn bản mô tả hoặc kể lại điều gì đó, và thường dài từ bốn đến tám câu, đôi khi còn dài hơn nữa. Những đoạn văn này ...Read more

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Much Much Less Than Math Symbol : r/LaTeX

The notation a ≪ b means that a is much less than b. (In measure theory, however, this notation is used for absolute continuity, an unrelated ...Read more

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Being both gifted and attractive is a combination for instant ...

Being both gifted and attractive is a combination for instant dislike from others. How do you deal with this?Read more

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People don't like when you're pretty and smart, including ...

Plus remember that beauty can come with brains and do not let others intimidate you because they have their own dumb stereotypes of beautiful ...Read more

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How to figure out sin^2 alpha. : r/learnmath

The adjacent of alpha is 3. The opposite is 4. Therefore, the hypotenuse is 5. I know sin alpha is 4/5. But we weren't told how to do sin2 alpha.Read more

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Câu hỏi có hình ảnh : r/trivia

Đến giờ mình đã dùng logo công ty, ảnh tĩnh từ phim, ảnh tĩnh từ quảng cáo truyền hình, nhân vật truyện tranh, thú cưng trên TV, và ảnh tĩnh từ ...Read more

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Is 4x5 photography really worth it? : r/AnalogCommunity

4x5 is among the most illogical of film formats to get into - everything is more expensive, heavy, and complicated than 35mm or 120.Read more

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“The welcome there is really friendly” - Does it sound natural?

I hear “welcome” as a verb, not a noun. “The welcoming there is really friendly” feels more correct. “-ing” on the word makes it a noun. A ...Read more

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Chim sẻ cánh đỏ là loài ăn tạp. Chủ yếu nó ăn thực vật ...

Chim sẻ cánh đỏ là loài ăn tạp. Chủ yếu nó ăn thực vật, bao gồm hạt cỏ dại và thóc vụn như ngô và lúa, nhưng khoảng một phần tư khẩu phần ăn ...Read more

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How do i find the key to the trailer behind sagas trailer?

I found the key to the stash box, but the door to the trailer directly behind that is locked and Google is no help because it directs me to the ...Read more

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Why do people use "Are you nuts" instead of "Are you crazy ...

Why do people use

Why do people use "Are you nuts" instead of "Are you crazy"? Is there a slight difference? If not, than what's the point? Discussion / Debates.Read more

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