A cada momento que vejo seus vídeos, percebo que sou medíocre na matemática, gostaria de melhorar meu desempenho nela, é algo que verdadeiramente gosto
Самый простой способ. Делаем замену а=10 100=10x10 b=9 81=9x9 19=a+b Ставим буквы вместо цифр. Вычисляем, делаем сокращения. Меняем буквы на цифры и извлекаем корень из дроби. Good luck!
So much trouble with algebra to get an answer just to be neat? It takes no more than 3-4 minutes for an average student to evaluate and find sqrt(73441). Obviously, 250 < sqrt(73441) < 300. Do evaluation again for 275^2 = ((300+250)/2)^2 , and find that 250 < sqrt(73441) < 275^2 (close). Now, sqrt(73441)=k, with k ending with 1 or 9 digit. Try 271 and voila.
What is the plan? Why were the numbers 81,19 and 100 used? Could it be by rearranging the terms, we have a perfect square? Please do NOT cancel the square root and square. The sq root of x squared is NOT x but the absolute value of x.
A cada momento que vejo seus vídeos, percebo que sou medíocre na matemática, gostaria de melhorar meu desempenho nela, é algo que verdadeiramente gosto
Loved it 🥹🥹🫶🏻🫶🏻🥰
a^4 + b^4 + ( a + b)^4
= a^4 + b^4 + ( a^2 + b^2 + 2 a b)^2
= 2 ( a^4 + b^4 + 2 a^2 b^2
+ 2 a b ( a^2 + b^2) + a^2 b^2)
= 2 ( a^2 + ab + b^2) ^2
Here in a = 10, b = 9
Hereby given expression
= √ (( a^4 + b^4 + ( a + b) ^4) /2)
= a^2 + a b + b^2
= 100 + 90 + 81
=271
Самый простой способ.
Делаем замену
а=10
100=10x10
b=9
81=9x9
19=a+b
Ставим буквы вместо цифр.
Вычисляем, делаем сокращения.
Меняем буквы на цифры и извлекаем корень из дроби.
Good luck!
Nice problem
Возня ради возни. 19 в четвёртой степени я в столбик посчитаю гораздо быстрее
Я не поняла почему 100 это 10 в 4 степени ?
@@РитаКлименко-п2фтам сто в квадрате изначально
Но сам процесс...
Its ok, but last should be catch a2+b2= x, and ab = y then formula apply,
I think it will be easy.
Muy bonito.
This shortcut works always for this type of equation: (Sqrt[100^2]+ Sqrt[81^2]+ Sqrt[19^4])*1/2 = (100 + 81 + 361)*1/2 = 271
Really excellent. Thank you.
So much trouble with algebra to get an answer just to be neat? It takes no more than 3-4 minutes for an average student to evaluate and find sqrt(73441). Obviously, 250 < sqrt(73441) < 300. Do evaluation again for 275^2 = ((300+250)/2)^2 , and find that 250 < sqrt(73441) < 275^2 (close). Now, sqrt(73441)=k, with k ending with 1 or 9 digit. Try 271 and voila.
It just refreshed my college memories. Thank you so much
5 минут возни - и двойки наконец сократились. А в конце пришлось вспоминать, чему равны a и b. Если бы заранее не записали, не решили бы.
Love it ❤
Langsung dikuadratkan kemudian dijumlahkan dan setelah itu diakarkan..selesai..kalau 1 soal 10 menit maka ini kurang efektif.
Why does everyone re-write the same problem below?
They want to get the time for the video.
Ответ: 271
Answer: 271
Respuesta: 271
Réponse : 271
Я за минуту в уме посчитала, пока он 10 минут тратил на этот легчайший пример
Adorei!
= (( 100^2+ 81^2+ 19^2)/2)^1/2
=( (100^2+ 81^2+19^2 + 2 *81*19- 2*81*19)/2)^1/2
= ((100^2+100^2-2*81*19)/2)^1/2
=(100^2-81*19)^1/2
=(10000. + 81 - 1620)^1/2
=8461^1/2
100^2 = 10000
81^2 = (80 + 1)^2 = 6400 + 160 + 1 = 6561
19^2 = (20 - 1)^2 = 400 - 40 + 1 = 361
36 x 36 = (40 - 4)^2 = 1600 - 320 + 16 = 1296
19^4 = (360 + 1)^2 = 129600 + 720 + 1 = 130321
(100^2 + 81^2 + 19^4)/2 = (10000 + 6561 + 130321)/2 = (146882)/2 = 73441
✓[(100^2 + 81^2 + 19^4)/2] = ✓73441 = 271
10:11 the number look familiar
Əla!
what is your name?
1/2(100+81+361)=271
wtf why all that when you could’ve just taken off the 2 powers of all and made the calculations like: 100+81+ 19x19/ 2
You can't just eliminate the powers with a sum under the radical. That can be done if it is only multiplication and division.
avg fat black guy
Of course
Dear master, I checked the result with the calculator and it doesn’t match. It’s 91,98… not 271. What’s wrong?
You probably did 19 squared and not to the fourth power.
Too much dance
/100 2 +81 2 +19 4 /2
I find answer in 1 min....smarter people can do it in 10 seconds
Rezultat je 10
Ответ, а семь и это спектр цветов.
362+76=438
438÷2= 219
219
10000 100 +100= 200 81-10=71 271
Ну теперь совершенно понятно, что любую скорость света можно найти через Х... Кстати, а сколько скоростей света существует?
What’s the point of solving it by hand when you can just punch it into a calculator?
Using a calculator is too easy.
1000 2. 81 2. 19332597&cost_cpa 9
2
100² + 81² + 19⁴ = 10000+6561+130321 = 146882
146882 : 2 = 73441
73441 = 62500+441+10500 = 250² + 21² + 2×250×21 = (250+21)² = 271²
√271² = 271
🤷🏼♀️
73441 sayısını bu şekilde parçalamayı nasıl düşündünüz?
Rakamlar büyük olsa da bunu görebilcek miydiniz?
190
Résultat = 271
271
73441
What is the plan? Why were the numbers 81,19 and 100 used? Could it be by rearranging the terms, we have a perfect square? Please do NOT cancel the square root and square. The sq root of x squared is NOT x but the absolute value of x.
Tüm sayılar pozitif?
say the to me again?
yes busy streets and money grabbing deals?
271
271
271
271
271
271