China | A Very Nice Algebra Problem | Math Olympiad
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- Опубликовано: 27 сен 2024
- Hello My Dear RUclips Family 😍😍😍
Hope you all are doing well 🥰🥰🥰
If you are enjoying my video about how to solve this math olympiad algebra problem then please Like and Subscribe my channel as it helps me a lot 🙂🙂🙂
Don't waste 30 seconds at the start of the video rewriting the problem. We already see the problem.
Agree
I did 2x but still got frustrated
Though the ending was little good so it's ok
It's an habit, i also do this, it helps me know what to do next
😂
@@BRAZILIAN_MIKUyess it's a brain stimulus
Nice one 👍👍👍👍
Easy but looks like a hard one ...
Some day I want to became this bro... Excellent video
great🎉
nice one thank you
Inpes tasi pantasan bayakya yang berinpestasidan menam saham karna utk bertaruh bila menang akan mendapatkan ke untungan.
والله مليت من طرق الحل
Lol i was wondering why 15 became 3.5 it was multiplication 💀 im used to parenthesis
It's basic arithmetic 💀
It's satisfying 🥲
Nice video
Bazi durumlari iki kere yazmak sacma zaman kaybi bunlari çözerken hizli olmak gerekli
Зачем переписывать уже написанный пример вначале??
Чтобы по итогу записать ответ
Wow
Super
Nice!!!
beautiful
But how 2 is equal to square root 5.may be possible.
0:03 during your solution you dropped a lot of facts: the sqrt of any number is +/-
Also when you divide by a symbol you should suppose that it is not zero
No sqrt of a constant number is always positive…only when sqrt of a variable say x is taken it become mod x which becomes +/- x
@@manishhemantPiMan not correct. The sqrt of anything can be pos OR neg.
@@daddykhalil909 if you dont believe me just google if square root of anything can be negative
@@daddykhalil909 learn about principal roots
As a turkish i confirm they are asking this questions us for entering university 💀💀
I am from Turkiye bro
abi ne zaman geldi böyle bir soru gözünü seviyim en basit haliyle eşlenik çıkıyor
@@wizardx0821de sordukları soru yerine bunu sorsalardı çözerdim
You are liar 😂😂
Easy problem , i solved it in the same way , great minds think alike
Blud really said he is great
@@electrokid638 it is just a saying
Скромно вы о себе!
ответ: корень из 8.8
How is root 25 5.5 and not 5?
Very good 👏
Yeah 👍
3.2
(V7+V3)/2 Удобно преобразовывать обратную дробь.
# 4#
# 91 #
❤❤❤❤
It takes me approximately 30 seconds to solve this
Beautiful solution
√3（√5+√7）+√5（√5+√7）
/（√5+√5+√3+√7）
=
Ez
Woh -- @3:05 you skip the most critical step. No idea how you got from the ones or the other
@robinsailo5652 Oh, yes ... I don't know why I didn't see that, but thank you pointing it out. The rest was clear.
(sqrt 5 + sqrt 7) is common factor
@@jadehuynh7234 Thank you! This is clarifying.
How you spend one year to solve an small probleme, you need only two minutes to do this, it look like night club, not equation,
ezy prb
Domans , good for 101 maths refreshing 😂❤
3:51 ¿Que paso con √3 y √5 que multiplicaban las operaciones? Desaparecieron
(Si alguien puede ser tan amable de responder mi pregunta se los agradecería mucho)
take the (5^1/2 + 7^1/2) out
Look at the whole numerator. (√5 + √7) is present twice. It can be factored out.
a(c + d) + b(c + d) = (a + b)(c + d).
Fantastic
... = √1,75 + √0.75. :)
😂😂😂😂😂😂
👍👍👍👍😀🇧🇷🇧🇷
√4+√5=2√5 это как?
√20=√4 x √5=2√5= √5 + √5
Idk is the awnser
Dont put dots between numbers like 3.5 but 3*5
Why he schould not use dots? It's for multiplication.
@@dinum94015 is the square root of 25 tho.
rt ab = rt x rtb
rt 25 = rt(5 x 5) = rt5 x rt5. Which is also 5
Plus he did it to factorize the numerator tonget (rt3 + rt5)(rt5 + 7)
@saviplayer4546 Yes, you are right... I made a mistake.. but look, my other comment on the dot multiplication is removed by the admin.. I was right about it.. I highlighted your comments to show everyone about my mistake, but he hid his mistake by deleting my comment.
@malteschluter4516 admin deleted my comment because he can't accept his mistake, which is disappointing. So I'm writing this again..
In maths, we can not use the dot multiplication everywhere because it's a different method of multiplication. It's different than the cross multiplication. We use it to multiply vectors.
Admin, Don't delete this, too. Admit your mistake instead.
@@dinum9401 Well, generally when people use multiplication in algebra They use dots to not confuse with the multiplication symbol (x) with x the most common letter
used for algebra. Like instead of 3xx it'll be 3∙x make it less confusing.
But yeah the admin could've at least explained himself instead of just deleted it
Deliye anlatır gibi anlatmanın gereği var mı 😕
√25=5 u video no sense bro
Could be so simple. People are good in math are awful teaching. Sad 😢
Chữ xấu quá
This is nice olimpic task in China, my IQ was growing during this video, Thx
Me after seeing this video my IQ level📈📈📈😂
This is a typical task for admission to a Turkish university. Since when did this simple task become an "Olympiad" task?
Super annoying music
Thanks
Ridiculo tanto trabajo para seguir dejando raíces
Meanwhile, me already calculated the value in my mind which is approximately 2.2😂😂😂
I already calculated it and it's 1 😅
Строго говоря, корень из четырех равен +/-2
ممتاز GOOD
Расскажите человеку, что можно печатать ;))))
Bravo
Let use casio calculator, it spend about 1 min 😅
почему когда извлекается квадратный корень учитывается только положительное число?
В каком моменте видео это?
I asked the same question
@@welcome-to-boroпо определению корня квадратного ЯАРИЫМЕТИЧЕСКОГО: это НЕотрицательное число, квадрат которого есть подкоренное
did this in 1 min with substitution. nice problem!
Simplifying a numerical expression using factoring and rationalisation is not algebra, there's no unknown. The goal behind using of the word algebra is to impress an audience. A mathematician is not supposed to play this kind of game; leave that to politicians.
It is algebra. You know there are computer algebra systems trying to simplify radicals, without numerical evaluation and this is NOT solved 100%
You make a valid point. Simplifying numerical expressions using factoring and rationalization is more about arithmetic than algebra, as there's no unknown variable involved. The use of the term 'algebra' might indeed be misleading in this context.
Excellent 👌🙏🙏.
Very nice!
Supose X=...👍
Uff!
Решала так же. И ответ тот же. Только для того, чтоб понять, что (1+2**1/2)**3=7+5*2**1/2, что неочевидно, решала систему х**3+6*х*у**2=7
3*х**2*у+2*у**3=5, где искомое число=х+у**2**1/2
Правую часть умножаем, а левую где х почему не умножаем?
Отличный способ решения! Действительно, соотношение (1+2^(1/2))^3 = 7 + 5 * 2^(1/2) неочевидно, и система уравнений помогает прояснить ситуацию. Приятно видеть такие интересные подходы!
素晴らしい解答だね。感心しました。
Law of distribution and rationalization
Задача нормальная. Но убожество типа рисования решения в графическом редакторе типа paint paint убивает какое-либо желание смотреть этот канал в дальнейшем. Дизлайк.
In my opinion, the graphic editor is *not* the big problem. It is showing all of the routine algebraic manipulations one after another instead of what might be done on a blackboard by crossing out and replacing.
x = something
y = something-equivalent
is used instead of x = {something} {something else}
or
x = something = something-else
Showing all of the intermediate steps *may* be appropriate for those not practiced in algebra. However, this level of detail takes up more visual space and obscures the underlying *insights* which are the most important.
One thing done well here is using substitution of variables instead for raw numbers. I enjoy it more when a problem is solved in somewhat abstract fashion, then back-substituted at the end.
Just my opinion. I am probably *not* the target audience at which this video may be directed. When I was in school, back when dinosaurs roamed the earth, calculators were large *mechanical* beasts which were used for business and accounting. We just had pen and paper, math tables and slide rules.
А степень "подробности" решения ? Для того, кто здесь радикал встретил первый раз в жизни?