China | Math Olympiad | Nice Algebra Radical Problem

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Master T Maths Class

Master T Maths Class

Күн бұрын

Пікірлер: 42
@shmuelzehavi4940
@shmuelzehavi4940 7 ай бұрын
Nice solution and explanation. There is another way to solve the problem after finding out that: 2x - 1 = √3 and therefore by squaring: 2x^2 = 2x + 1 By multiplying by x we obtain: 2x^3 = 2x^2 + x = 3x + 1 By taking to the third power we obtain: 8x^9 = 27x^3 + 1 + 9x (3x + 1) = 27x^3 + 27x^2 + 9x + 1 Therefore: 16x^9 = 27(2x^3 ) + 27(2x^2 ) + 9(2x) + 2 = 27(3x + 1) + 27(2x + 1) + 18x + 2 And therefore: 16x^9 = 153x + 56 The rest is known.
@MasterTMathsClass
@MasterTMathsClass 7 ай бұрын
Well done 🎉
@amaama4140
@amaama4140 6 ай бұрын
Very nice math solution, but I genuinely thought this was recorded in 2006. You should consider using better equipment. It really makes a difference.
@shannonmcdonald7584
@shannonmcdonald7584 6 ай бұрын
Very nice. 2 things I didn't understand: root 2 was replaced with 1, and 4x² was rewritten as (4x + 2).
@therrontelford2786
@therrontelford2786 6 ай бұрын
I noticed that too
@shannonmcdonald7584
@shannonmcdonald7584 6 ай бұрын
@@therrontelford2786 I figured out the 4x+2, but not the 1
@johnmaulkin-ur8lm
@johnmaulkin-ur8lm 7 ай бұрын
Many thanks; good health to you.
@MasterTMathsClass
@MasterTMathsClass 7 ай бұрын
🙏
@НеллиПшено
@НеллиПшено 5 ай бұрын
Простое решение. Все упрощаем и вычисляем методом устного счета. 1. Сокращаем все выражение в скобках на √2. 2. Складываем числитель √ 3+1 округляем, получаем 2,8. 3. Делим числитель на знаменатель 2,8 : 4 = 0,7. 4. Возводим в 9 степень 0,7 х 0,7= 0,49 округляем до 0,5. 0,5 х 0,5 х 0,5 х 0,5= 0,0625 округляем до 0,06 0,7 х 0,06=0,042 Если нужна большая точность, используем калькулятор.
@JutroToDzis
@JutroToDzis 6 ай бұрын
((sqrt,(3)+1)³)³ (a+b)³=a³+3a²b+3ab²+b³ twice. without x. Simple.
@robertosierrai7486
@robertosierrai7486 6 ай бұрын
Gracias a estos ejercicios los alumnos se alejan de las matemáticas. Ejercicios que no tienen un objetivo, ni aplicación práctica. Los jóvenes de hoy en día aprenden diferente a los jóvenes que fuimos nosotros. El chico de hoy agarra la calculadora y resuelve en 2 minutos
@MasterTMathsClass
@MasterTMathsClass 6 ай бұрын
Thanks 🎉
@TioCelo72
@TioCelo72 7 ай бұрын
16*4x^2 is not equal to 16(4x+2).
@obobro
@obobro 6 ай бұрын
4x^2 = 4x+2 from above, that was just a simple replacement 3:30
@nikolayguzman331
@nikolayguzman331 7 ай бұрын
The idea is very deep, but if ((((SQRT 3 +1)/2) ^2)^2)^2 and Result multiply by (SQRT 3 +1)/2) the result will be more faster, for my opinion.
@MasterTMathsClass
@MasterTMathsClass 7 ай бұрын
Nice one🎉
@elenaokon2736
@elenaokon2736 7 ай бұрын
It's interesting, but maybe the direct calculation was even simpler. But anyway, nice exercise!
@MasterTMathsClass
@MasterTMathsClass 7 ай бұрын
Thanks 🎉
@khalidalward3483
@khalidalward3483 5 ай бұрын
The solution steps do not need this complexity , Which has no need Answer the question: no more than 4 steps,, and with ease
@RyanLewis-Johnson-wq6xs
@RyanLewis-Johnson-wq6xs 7 ай бұрын
(Sqrt(6)+Sqrt(2)/Sqrt(8))^9=8.28125+4.78125Sqrt(3)
@narineaghajanyan702
@narineaghajanyan702 7 ай бұрын
Շատ բարդ է լուծած , կարելի արմատ 2-ով կրճատելուց հետո, 2անգամ խորանարդ բարձրացնել։
@Ajaykumar123_rcm
@Ajaykumar123_rcm 3 ай бұрын
(√3+1)/2^9
@MasterTMathsClass
@MasterTMathsClass 3 ай бұрын
👍
@遠傳五華
@遠傳五華 7 ай бұрын
Compared to direct calculation, your way takes triple efforts at least.
@VanThanhNguyen-zd9gd
@VanThanhNguyen-zd9gd 6 ай бұрын
You solve that mathematic become complex
@Snake96369
@Snake96369 5 ай бұрын
Aplicando el triángulo de Pascal
@PauloSustelo
@PauloSustelo 6 ай бұрын
Newton's binomial is much easier and direct
@evgeniya-nes
@evgeniya-nes 6 ай бұрын
х=(√3+1)/2 х^2=(√3+2)/2 х^4=(4√3+7)/4 х^8=(56√3+97)/16 х^9=(153√2+265)/32
@robertveith6383
@robertveith6383 5 ай бұрын
You have a typo on the last line. Change the sqrt(2) to sqrt(3).
@ludmilak9396
@ludmilak9396 7 ай бұрын
Показатель в выражении -- это буква q или цифра 9? Научитесь, пожалуйста, грамотно писать.
@shmuelzehavi4940
@shmuelzehavi4940 7 ай бұрын
No need to ofense !
@AndriiBilous
@AndriiBilous 6 ай бұрын
Душнила!😂
@nancyvicente5144
@nancyvicente5144 6 ай бұрын
La verdad me confunde
@nadjibhaddoud9109
@nadjibhaddoud9109 5 ай бұрын
C'est quoi ça?
@miaousclecartoon
@miaousclecartoon 2 ай бұрын
des maths
@Naceuryt
@Naceuryt 5 ай бұрын
ليست هذه رياضيات
@key_board_x
@key_board_x 7 ай бұрын
= { (√6 + √2) / √8 }^(9) = { [(√6 + √2).√8] / 8 }^(9) = { (√48 + √16) / 8 }^(9) = { (4√3 + 4) / 8 }^(9) = { (1 + √3) / 2 }^(9) = { (1 + √3) }^(9) / 2^(9) First = (1 + √3)^(9) = (1 + √3)².(1 + √3)².(1 + √3)².(1 + √3)².(1 + √3) = (1 + 2√3 + 3).(1 + 2√3 + 3).(1 + 2√3 + 3).(1 + 2√3 + 3).(1 + √3) = (4 + 2√3).(4 + 2√3).(4 + 2√3).(4 + 2√3).(1 + √3) = 16.(2 + √3).(2 + √3).(2 + √3).(2 + √3).(1 + √3) = 16.(4 + 4√3 + 3).(4 + 4√3 + 3).(1 + √3) = 16.(7 + 4√3).(7 + 4√3).(1 + √3) = 16.(49 + 56√3 + 48).(1 + √3) = 16.(97 + 56√3).(1 + √3) = 16.(97 + 97√3 + 56√3 + 168) = 16.(265 + 153√3) = (265 + 153√3) * 2^(4) Recall = { (1 + √3) }^(9) / 2^(9) = (265 + 153√3) * 2^(4) / 2^(9) = (265 + 153√3) / 2^(5) = (265 + 153√3) / 32 ≈ 16.5626
@robertveith6383
@robertveith6383 5 ай бұрын
Don't use decimal points for multiplication.
@giovanbattistamelluso3413
@giovanbattistamelluso3413 7 ай бұрын
I did not understand anything !
@JonathanAlabi
@JonathanAlabi 7 ай бұрын
Watch it again
@shmuelzehavi4940
@shmuelzehavi4940 7 ай бұрын
Are you joking ?
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