Solving Exponential Equation

  Рет қаралды 257,400

Kasyanno EZMath

Kasyanno EZMath

Күн бұрын

Пікірлер
@AdonisCreedIsrael4411
@AdonisCreedIsrael4411 2 жыл бұрын
X can solve itself.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
I love ❤️ your feedback! It gave me a loonngggg good laugh! 👍 you made my day!
@AdonisCreedIsrael4411
@AdonisCreedIsrael4411 2 жыл бұрын
@@KasyannoEZMath Just remember that. You owe Y because it's been 100 years to solve it.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@user-dh6vj5pd1m okay, Adonay! Have a wonderful day 😊
@starpawsy
@starpawsy 2 жыл бұрын
But it has to start by (a) recognising that it has a problem, and (b) WANTING to solve itself.
@AdonisCreedIsrael4411
@AdonisCreedIsrael4411 2 жыл бұрын
@@starpawsy c. I do not care. just remember Mcnichols. ;)
@weggquiz
@weggquiz Жыл бұрын
this questions uses formulas, ln(golden ratio)/ln(7/6)
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
Exactly, Tutor christabel! Thanks!
@hilmahango-yi3ht
@hilmahango-yi3ht Жыл бұрын
Thank a lot sir.. i was struggling with this.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
You're very welcome, Hilma! Have a good one!
@kevinmorgan2317
@kevinmorgan2317 2 жыл бұрын
No need to take log to base 7/6. Just use ln or log to base 10 and the answer is identical... and quicker.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks for your feedback, Kevin Morgan. Have a great day.
@abayomiadekanbi2123
@abayomiadekanbi2123 2 жыл бұрын
Kasyanno is definitely targeting larger audience. This is not a classroom where you can assume the previous knowledge of the students watching. His videos are explanatory and there's nothing wrong with that.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@abayomiadekanbi2123 ,that's exactly bull's eye! You're awesome! The aim of this channel is to reach out to as many people as possible the whole spectrum of people wanting to learn math the easiest way possible. This includes audience who don't have mathematics backgrounds and yet wanting to learn math and more. Cheers 🍻! Have a wonderful day!
@kevinmorgan2317
@kevinmorgan2317 2 жыл бұрын
@@abayomiadekanbi2123 I won't disagree with that. But are you suggesting people shouldn't politely comment on the solution? That would be very odd.
@AZ-by5ps
@AZ-by5ps 2 жыл бұрын
You are right....should use log base 10 and obtain the answer fast, very simpla.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
Interested in learning more about different techniques in solving exponential equations, you can visit my channel and check out my playlist: Solving Exponential Equations. Thanks all!
@shakamaos80
@shakamaos80 2 жыл бұрын
Beautifull solving it reminds me of the laplace transform
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
👍
@7th_dwarf542
@7th_dwarf542 2 жыл бұрын
very neat. Thank you for your work.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're very welcome, 7th_dwarf! Have a wonderful day!
@theodoresweger4948
@theodoresweger4948 2 жыл бұрын
Thanks for finishing the problem some leve it half done..
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're very welcome, Theodore!
@elliotjones3098
@elliotjones3098 2 жыл бұрын
this is great...very cool
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks for your awesome feedback, Elliot Jones!
@aspenrebel
@aspenrebel 2 жыл бұрын
Man, Ive really forgotten my Math. I use to know all that. Ive gotten too old.
@GeoCalifornian
@GeoCalifornian Жыл бұрын
Why can’t we take the log of both sides, -at the very beginning? /Thanks in advance!
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
That's a very good question, Geo. In this kind of equation, where you have all three exponential terms, the best way to do is to reduce the terms into just two exponential terms if you can't do it into just one term bearing variable exponent. You can achieve this by dividing the whole equation by any term or by factoring out. Then, you can isolate that term by itself, then take log on both sides of the equation. This is the reason why you can't take log on both sides because you can't isolate the exponential term by itself as a first step.
@GeoCalifornian
@GeoCalifornian Жыл бұрын
@@KasyannoEZMath Thank-you Kasyanno! --I really needed the answer to this question... /You're doing God's work!
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
All good 👍 Geo! Have a good one!
@ĐắcTuấnOfficial
@ĐắcTuấnOfficial 2 жыл бұрын
why don't you guys use casio for quick, why use the solution formula of quadratic equation?
@shreyesveer8073
@shreyesveer8073 2 жыл бұрын
It’s similar to the 4^x + 6^x = 9^x problem Answer is most probably: ln(golden ratio)/ln(7/6) Golden ratio is: (1+sqrt(5))/2 for those who don’t know
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're exactly right, shreyesveer! Thanks for sharing 👍.
@mikaeeldolie6215
@mikaeeldolie6215 2 жыл бұрын
obviously, but it's nice to notice
@aspenrebel
@aspenrebel 2 жыл бұрын
The only thing that I can remember about logs now is that is what you throw on the fire.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Aspenrebel, we need logs now for winter! 😁 Happy New Year!
@aspenrebel
@aspenrebel 2 жыл бұрын
@@KasyannoEZMath no Winter here, yet. 51F+ in Boston.
@justanotherguy469
@justanotherguy469 2 жыл бұрын
It is very tedious, but I appreciate the way you did not make assumptions about your viewers knowledge base and skip steps. Do try and get a larger blackboard though. One more question: is a blackboard still a blackboard if it is white?
@justanotherguy469
@justanotherguy469 2 жыл бұрын
Answer: yes, it's called a whiteboard Dodo! 🤪
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks for your thoughtful feedback, @justanotherguy! This tutorial video covers a wide range of audiences from all walks of life, whether or not they have mathematics backgrounds. This refers to anyone who would like to learn or relearn math or anyone fascinated in solving puzzles like math problems. Have a wonderful day!
@kennethstevenson976
@kennethstevenson976 2 жыл бұрын
You have just exceeded my ability to solve this problem by hand.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Glad you think so! Thanks for your feedback, Kenneth Stevenson! You're awesome! Have a great day!
@juliangonzales5884
@juliangonzales5884 2 жыл бұрын
This may be why I was lacking in math but why would you not move all values to one side, add/sub, and then perform log?
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
That's a good question, Julian! We can't take the log if we have two or more terms containing a variable. We have to reduce the terms containing the variable into just one on one side of the equation and, on the other side, must be just one term containing just a constant. In this situation, we can now take a log on both sides of the equation and get the value of the variable. Have a wonderful day!
@GregorShapiro
@GregorShapiro Жыл бұрын
A little more scripting and separation of the lines of your equations would make this a lot clearer.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
Thanks for your feedback, Gregor! I appreciate it 🙏.
@slchance8839
@slchance8839 Жыл бұрын
well done. At step 2, I divided both sides by 7^x6^x instead of just 6^x. I KNEW dividing both sides by one or both would get a different form of the equation, i just picked the wrong one. I got stonewalled later on, but forgot my second option of dividing by just ONE of the perfect squares. this was relaxing to watch. I'm sitting here, with a brandy on my balcony overlooking the view and my car below (67 corvette....it's inspiring to look at...one of my best purchases of the last 15 years!) and once you divided by 36, i stopped the video and got the quadratic trinomial (I used the letter "a" instead). At the end, I compared answers. I stopped short of the calculator but got the same radical you did. thanks for posting.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
SL Chance, that's awesome clarity of narrative that you have -- a perfect picture of a wholesome day! I like how your story flows. Thanks for your time. Have a wonderful day!
@slchance8839
@slchance8839 Жыл бұрын
@@KasyannoEZMath thank you for responding, and again for posting.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
@@slchance8839 all good, SL Chance! 👍. Thanks!
@adailcavalheiro862
@adailcavalheiro862 2 жыл бұрын
You could divide by 42^x, and It would be easier.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Absolutely! You can do that also. Thanks for sharing your idea.
@GillAgainsIsland12
@GillAgainsIsland12 2 жыл бұрын
Yes, well done. But you only need to take the log of both sides at the end, and using the rules for logarithms, get xlog(7/6) = log(1+sqrt(5)/2) and solve for x by simply dividing the log(7/6). I realize that is what you basically did, but you could have skipped those extra steps.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks for your feedback, Vincent! I appreciate it 🙏. Have a wonderful day!
@MLDawn
@MLDawn 2 жыл бұрын
Why not just taking the log of both sides and taking it from there? Much simpler.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
I would love to see your solution.
@matcao9962
@matcao9962 2 жыл бұрын
An alternative way If one rewrite the equation as (7^x)^2 - (6^x)*(7^x) = (6^x)^2, then we can make the right-hand side as a perfect square - to reduce three terms to two terms of this equation: (7^x)^2 - (6^x)*(7^x) + (1/4)* (6^x)^2 = (5/4)*(6^x)^2 that is (7^x - (1/2)*6^2)^2 = (5/4)*(6^x)^2 take square root of both sides and re-group the equation: 7^x = [1 +/- sqr(5/4)]*(6^x) or (7/6)^x = [1 +/- sqr(5/4)]. Now, it's easy to solve for x.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're awesome! Thanks for sharing your technique in solving this equation. 👍
@jige1225
@jige1225 2 жыл бұрын
Nice technique. May I ? [...] that is (7^x - (1/2)*6^x)^2 = (5/4)*(6^x)^2 take square root of both sides and re-group the equation: 7^x = [1/2 +/- sqr(5/4)]*(6^x) ;-)
@prasenjitsanyal3755
@prasenjitsanyal3755 Жыл бұрын
49^x-42^x=36^x, or 7^x.7^x-7^x.6^x=6^x.6^x, or a^2-ab=b^2, or a^2-2ab.b/2+(b/2)^2=b^2+(b/2)^2, or,(a-b/2)^2=5b^2/4 or, a-b/2=+-sqrt(5)b/2 or, a/b=(1+-sqrt(5))/2 or, (7/6)^x=(1+-sqrt(5))/2 Now taking log in both side xlog(7/6)=log((1+-sqrt(5))/2) .Neglecting the log of the negative term. xlog(7/6)= log((1+sqrt(5)/2) or, x=3.122
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
Excellent, Prasenjit! Thanks for sharing your solution 👍! Have a wonderful day!
@jim2376
@jim2376 2 жыл бұрын
Just a guess: ln(golden ratio)/ln(7/6). These problems are formulaic.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Brilliant, jim! Cheers 🍻!
@abeonthehill166
@abeonthehill166 2 жыл бұрын
Great explanation ! What is the highest value of ‘pi” and to how many decimal points can it be taken to ?
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks! Please be specific on what you mean.
@aspenrebel
@aspenrebel 2 жыл бұрын
The number of decimal places to which pi can be taken to is infinite. When I was a kid I memorized pi out to a lot of decimal places. I don't remember how many.
@aspenrebel
@aspenrebel 2 жыл бұрын
Pi r squared. No!! Pie are round.
@aspenrebel
@aspenrebel 2 жыл бұрын
Pi only has 1 value. .... 3.14159.........
@goofe.washington953
@goofe.washington953 2 жыл бұрын
I would have as much chance of solving the problem in this video as I did back in high school with word problems. Those word problems were impossible for me, so much so that you could have written them like this: 1)John can paint 7/16ths of a house in two days 2)Bill can paint 1/7th of the house in 1 1/2 days. If they both start on the same day, at the same time, what color paint did they use?
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Two unrelated things are getting mixed up! The answer would have been any color of paint that was used. 😁
@ourv9603
@ourv9603 2 жыл бұрын
Why is Algebra always asking us to find its EX? I mean, WHY? !
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
That's a very good question, OURv! It was Rene Descartes who introduced the use of letters to stand for the unknown. Before his time, people used to refer to the unknown as the "thing." He used x, y, and z to represent the unknown value or variables in math. That representation of unknown quantities or variables carried over to the present time.
@aspenrebel
@aspenrebel 2 жыл бұрын
Wants to get those alimony payments
@gelbkehlchen
@gelbkehlchen 2 жыл бұрын
Solution: 49^x-42^x = 36^x ⟹ 7^(2x)-6^x*7^x = 6^(2x) |/6^(2x) ⟹ (7/6)^(2x)-(7/6)^x = 1 |Substitution: (7/6)^x=z ⟹ z²-z = 1 |-1 ⟹ z²-z-1 = 0 |p-q-formula ⟹ z1/2 = 1/2±√(1/4+1) = 1/2±√(5/4) = 1/2±1/2*√5 = (1±√5)/2 ⟹ z1 = (1+√5)/2 and z2 = (1-√5)/2
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're awesome! Thanks for sharing your solution 👍. Have a wonderful day! Cheers 🍻!
@iuli007
@iuli007 Жыл бұрын
This is more to The point
@akky247
@akky247 2 жыл бұрын
I understood uptill when quadratic equation attacked !
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Not so hard to understand. It's repetitious. Have a great day, SMG Productions!
@THEMATHREFUGE
@THEMATHREFUGE 2 жыл бұрын
👍🏽👍🏽
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
👍
@equus6460
@equus6460 2 жыл бұрын
The more accurate answer would be 3.12169771550051 These are to be solved by computers and not by humans. This is a typical regression problem to be solved.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
That's amazing, equus! Thanks for your time commenting on this video. I appreciate it very much. Have a great day!
@lazyoldmanathome7699
@lazyoldmanathome7699 2 жыл бұрын
Quoting to so many decimal places is, of course, nonsense.
@equus6460
@equus6460 Жыл бұрын
@@lazyoldmanathome7699 buddy providing more accurate answer is a capability that you do not possess so comment not.🤫
@kfjfkeofitorhf9520
@kfjfkeofitorhf9520 2 жыл бұрын
X=7/6
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Kfjfk, you need to reconsider your answer. Thanks!
@mathematic4u899
@mathematic4u899 2 жыл бұрын
Good
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks, Mathematic4u!
@abhishekchoudhary4689
@abhishekchoudhary4689 Жыл бұрын
I never understand why they will get the numerical value after getting the ans because it is totally impractical to do this 80 percent of the time in higher mathematics answers are always in complex form.
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
Numerical value was needed for the purpose of answer verification. There would be no harm if the value is converted into numerical form.
@redouanchab3an331
@redouanchab3an331 Жыл бұрын
6b
@crustyoldfart
@crustyoldfart 2 жыл бұрын
I don't see the point of spelling out a numerical solution. There is no indication that this is a practical problem in which a numerical solution is required. Also, having arrived at the quadratic y^2 - y - 1 = 0 , which can be written y^2 = 1 + y , the solution should be recognized by anyone with experience as the generating equation for the golden ratio phi = 1/2 * ( 1+sqrt(5) ). And we can quickly assert that x = ln(phi) / ( ln(7) - ln(6) )
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Harold Potts, that's an excellent point of view. Thanks for your time. Have a great day!
@giftrutavi1774
@giftrutavi1774 2 жыл бұрын
very true, the problem was created from the phi
@anonymike8280
@anonymike8280 2 жыл бұрын
It's not a piece of cake, but it's nearly pi.
@ĐắcTuấnOfficial
@ĐắcTuấnOfficial 2 жыл бұрын
hi
@giftrutavi1774
@giftrutavi1774 2 жыл бұрын
The golden ratio will always appear
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Yep
@andreluizvignamussoi1037
@andreluizvignamussoi1037 2 жыл бұрын
log(1+5^1/2)/log(7/6) ~ 4.869
@KasyannoEZMath
@KasyannoEZMath Жыл бұрын
You need to check your answer, Andre.
@1309gsk
@1309gsk 2 жыл бұрын
you have oresebted a comolicated soloutin, the answer can ne simplfied by aviding quadratic formulae
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks for your feedback, Steve!
@abayomiadekanbi2123
@abayomiadekanbi2123 2 жыл бұрын
Your vocabularies are not existing in English dictionary. Simple English you can't type and you're here castigating someone else's brain racking work. What a life.
@RakedLeaf
@RakedLeaf Жыл бұрын
we're always trying to solve something except the truth
@profphilbell2075
@profphilbell2075 2 жыл бұрын
A long winded approach to a rather simple problem.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Thanks, Phil! You're right on that. There are several ways to solve this equation, and it so happened that I chose the longer one inadvertently. I happened to see one of your videos about E=mc². The content is good , just get your camera steady. Have a wonderful day!
@profphilbell2075
@profphilbell2075 2 жыл бұрын
@@KasyannoEZMath yes, you make great content. I intend to send my struggling engineering students to your channel. I do love the way you don’t miss any of the steps along the way.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@profphilbell2075 Hi, Phil! Thanks for your feedback! I do appreciate it 🙏 very much, sir. In my videos, I emphasize and make it clear all the steps and formula involved along the way as I solve a problem or equation. The purpose of my channel is to encourage anyone from all walks of life wanting to learn or relearn math in their own ways through KZbin videos like what I do. This means including a wide range of audiences without math backgrounds. You're awesome, Phil! 👍Thank you very much, sir! Have a wonderful day or night!
@starpawsy
@starpawsy 2 жыл бұрын
powers of 49 will always be odd, the other two terms are always even. Thus the answer is not an integer, so I am not interested. Next video !
@sauravkumarmishra2020
@sauravkumarmishra2020 2 жыл бұрын
How you find 7 / 6 Only
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
7/6 is the result of dividing 6 from numerator and denominator 42/36. Thanks for visiting my channel, saurav! Have a wonderful evening!
@joebrinson5040
@joebrinson5040 2 жыл бұрын
@@KasyannoEZMath yes, but why did you divide numerator and denominator by 6? [And then you apparently discarded the 6 that you divided by. ] How is this a valid algebraic operation to the equation?
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@joebrinson5040 Thanks for your time. I don't see the connection of your question based on the solution to the exponential equation in the video.
@joebrinson5040
@joebrinson5040 2 жыл бұрын
@@KasyannoEZMath sorry, you are correct. I had a brain freeze - you simply reduced 42/36 to lowest terms 7/6. My mistake.
@MurderMostFowl
@MurderMostFowl Жыл бұрын
@@joebrinson5040 he simplified the fraction… it’s like 8/6 = 4/3. You pull out a common factor, in his case 6…
@QuynhNguyen-cw6px
@QuynhNguyen-cw6px 2 жыл бұрын
49=7.7; 42= 6.7;36=6.6; chia 2 vế cho 36^x; (49/36)^x_(7/6)^x_1=0; (7/6)^x =T; T^2_T_1=0; (T>0); T
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
Excellent, Quynh! Have a wonderful day!
@簡欽慧
@簡欽慧 Жыл бұрын
不認真
@ЭлизаСырогина
@ЭлизаСырогина 2 жыл бұрын
Слишком долго !
@rubensramos6458
@rubensramos6458 2 жыл бұрын
One can find the general solution for this problem here: www.researchgate.net/publication/365126873_On_the_Solutions_of_ax_bx_cx
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
You're awesome, Rubens Ramos! That's an excellent work! Thanks for your feedback.
@rubensramos6458
@rubensramos6458 2 жыл бұрын
@@KasyannoEZMath Thank you. I like the problems you solve. If possible, please, show my function (Lambert-Tsallis) and my analytical solutions to your mathematical friends.
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@rubensramos6458 you're very welcome. I will. Have a wonderful day!
@rubensramos6458
@rubensramos6458 2 жыл бұрын
@@KasyannoEZMath Thank you very much. Have a wonderful day you too. I will sleep in few hours (it is 7pm now in Brazil).
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@rubensramos6458 take care. Enjoy the rest of your day. 👍
@idlsjay
@idlsjay 2 жыл бұрын
How does X then build a bridge?😮😳🫡
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
X-men build bridges! They just remained anonymous. 😉 Happy New Year!
@JustwaitNwatch-w
@JustwaitNwatch-w 2 жыл бұрын
I always understand perfectly when i see the solution step by step but i cant think how to start solving in the first place lol 🥲🥲🥲
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
I exactly know where you're coming from. To get the hang of it is that you just need to do hands-on doing it, solving the equation. Repetition is the key. Write the equation, then write the solution while following the video. Then, try solving the same equation following the same solution without looking at the actual written solution you wrote based on the video. Have a great day!
@JustwaitNwatch-w
@JustwaitNwatch-w 2 жыл бұрын
@@KasyannoEZMath thank you so much for a detailed explanation , i appreciate it , i will try to do it as you said 😊😊
@KasyannoEZMath
@KasyannoEZMath 2 жыл бұрын
@@JustwaitNwatch-w you're very welcome! Thanks for watching my videos. Have a wonderful day!
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