Это видео недоступно.
Сожалеем об этом.
Not as Hard as It Looks
- Добавить в
- Мой плейлист
- Посмотреть позже
- Поделиться
Поделиться
HTML-код
Размер видео:
- Опубликовано: 8 июн 2024
- 9th grade exponential equation.
Комментарии • 46
Следующие
Автовоспроизведение
Are they equal to Each other?Mr H Tutoring
Просмотров 46 тыс.
Equation with Multiple Square RootsMr H Tutoring
Просмотров 63 тыс.
Lambert W FunctionPrime Newtons
Просмотров 587 тыс.
Warhammer 40,000: Space Marine 2 - Multiplayer TrailerWarhammer
Просмотров 454 тыс.
Colin Farrell Opens Up About His Son With Angelman Syndrome | PEOPLEPeople
Просмотров 3,3 млн
Madden 25 | Gameplay First LookEA SPORTS MADDEN NFL
Просмотров 328 тыс.
W Sound 01 "Soltera" - Blessd, Westcol, Ovy On The Drums (Official Video)W Sound
Просмотров 1,5 млн
How do I find x? Exponential equation with two different bases. Reddit precalculus r/Homworkhelpbprp math basics
Просмотров 807 тыс.
Synthetic Division and Remainder TheoremMr H Tutoring
Просмотров 43 тыс.
You can use the X Method to Factor Quadratics whether or not the squared term has a coefficient!Help with Mathing
Просмотров 6 тыс.
solving equations but they get increasingly awesomeblackpenredpen
Просмотров 1,1 млн
Why you didn't learn tetration in school[Tetration]Prime Newtons
Просмотров 3,9 млн
Cambridge Mathematician Reacts to 'Animation vs Math'Ellie Sleightholm
Просмотров 392 тыс.
90% of Students Get This WrongMr H Tutoring
Просмотров 51 тыс.
"It's just a Coincidence"Digital Genius
Просмотров 590 тыс.
7 times (2 + 18 / 2 x 3) = ? BECAREFUL, many will do this in the WRONG ORDER!TabletClass Math
Просмотров 1,8 млн
❗⚡ВСУ захватили 350 кв.км. Россия перебрасывает войска из Украины в Курскую областьВОТ ТАК
Просмотров 698 тыс.
ВСУ в Курской области. Срочники в плену. Эвакуации нет. Путин говорит о "масштабной провокации"Радио Свобода. Новости
Просмотров 1,2 млн
ОНИ НИКОГДА НЕ СПЯТNastya Jackson
Просмотров 770 тыс.
Жители Суджи просят Путина о помощи. Пропагада призывает к мобилизации. В России блокируют YouTubeТелеканал Дождь
Просмотров 766 тыс.
САМОКАТЧИК ЧУТЬ НЕ КУПИЛ ГЕЛИКВертикальный Синдикат
Просмотров 279 тыс.
Delicious watercolor palette #yummy #sweets #food #drawing #candy #parenting #paintingLa La Laugh! Shorts
Просмотров 2,7 млн
ЭВОЛЮЦИЯ ВЫСОКГО ОРЕХА В PLANTS VS ZOMBIES 2!IGRARIUM - Игровые обзоры
Просмотров 366 тыс.
OG Buda - ЛазерныйOG BUDA
Просмотров 141 тыс.
Giving me every desire to go back and revisit those maths classes from 26 years ago. You bring so much understanding to the topic. Thank you.
My math teacher said that substitution is the makeup of maths which makes math look beautiful 😂🤯
The method of substitution stays forever important in the field of mathematic calculations. Thank you very much, Sir.
Just looking at the equation I thought that x was 2.
Yeah me too, 😂😂😂
Thank you sir.
x = 2
Here is my method.
Transpose 12 to the right side to give:
4^x - 2^x = 12
Rewrite 4^x as 2^2x; and rearrange the entire expression thus;
2^2x - 2^x = 12
2^x ● 2^2 - 2^x = 12
Next, factor out 2^x.
2^x(2^2 - 1) = 12
2^x(4 - 1) = 12
2^x(3) = 12
2^x = 4 (Divide both sides by 3)
2^x = 4 => 2^x = 2^2
By comparison, x = 2
Great class
(4x4)-(2x2)-12 is the aswer
❤❤
I love this type of problem because I can just do it in my head especially when I got lazy to grab a pen and paper lol
Just looking at this and without even having watched the video, I immediately see that x = 2.
Yes, true. But you also have to observe that 4^x - 2^x - 12 is ever increasing, as x increases, so there is at most one solution to 4^x - 2^x - 12 = 0 and you found it.
relatable
Yes just use substitution. y²-y-12=0 . Then just solve the quadratic equation and equate 2^x to be the the solution of that equation and then solve it using logarithms and then use your calculator
I want to see the complex solution.
Anyone interested in how to handle the complex case?
There are also these types of equations, like 3^x+2^x=13. Just by looking at it, we know that x=2, but how to calculate it?
Math has a different symbol/statement for no solutions. Part of void, no equal
Now...what happens when you can't find a common base for the exponential terms? For example, 9^x - 4^x = 6^x ?
2^2x-2^x-12=0
2^x=y
y^2-y-12=0
y=[1+-rq(1+48)]/2
y=[1+-7]/2
y1=4 y2=-3
So basically the problem is complex because we dont know the x and so on
personally id log the equation
16-4=12 is obvious here
@@rivenoak I solved it differently: since after making 4^x of the base 2, the powers can be added. So, I added power of x to 2. Then I got 2^(2+x) and moved -12 to the other side which became +12. Then I took logs of every expression and also the solution was +2.
@@user-ky5dy5hl4d perhaps the equation was a question in another vid already or it was a tickle in my brain which loves math problems: the solution poked me very soon.
no log calculations required, but it wont work every time for sure
@@rivenoak If you love math problems then I do, too. But I also love physics problems. Maybe you can help me. What causes the speed of light? What is the definition of time?
Can't add the powers @@user-ky5dy5hl4d
Nose bleeding again😳
Stop picking your nose. Its symbolic of schizophrenia.
4^x-2^x-12=0
(2^x)²-2^x-12=0
Let y=2^x
y²-y-12=0
(y+3)(y-4)=0
y+3=0
y=-3
2^x=-3 (not possible)
y-4=0
y=4
2^x=2²
x=2 ❤
X=2.
that is solotion, but I still dont belive😂
Why doesn't the following have the same result?
x log(4) - x log(2) = log(12)
log(a+b)≠log(a)+log(b), only
log(ab)=log(a)+log(b)
@@lifewatery7472 ohhhhhhhh! Thanks!
You should include the proof of you answer. Show how you can plug your solution back into the original equation.
I agree that you should always check your candidate solutions to see if they are correct. In this case, it's quite simple to do this, 4ˣ-2ˣ-12=4²-2²-12=16-4-12=0 so it is a good solution.
If x E R we can use also this method:
4^x - 2^x - 12 = 0
2^(2)x - 2^x = 12
2^(2x) - 2^x = 16 - 4
2^(2x) - 2^x = 2^4 - 2^2 (the same bases and the same operation, we can compare all exponents of LHS and RHS)
2x = 4 and x = 2
x = 2
It may be obvious that the solution is +4. But one can use log, too.
Log doesn't allowed negative number 😅
@@ccboys3430 Correct. That is why you can move -12 on the other side od the equation and have +12. Also, there is a difference between -log(x) and -log(-x) or log(-x). In negative x you can't use negative numbers. But -log(x), one can.
@@user-ky5dy5hl4dlog(-x) is possible
X=0
Just by looking at the problem, I had the answer..
this was so easy
If i said it once, I've said it hundred times, THANK YOU.
only one thing, i don't think they teach this to 9 or 10 graders in this country, maybe 2nd year in college. 😂😂😂