3:37 i think you meant to say you rounded not truncated :)

@AndyMath

Ай бұрын

Oh no! You are right! I messed that up...

@bebektoxic2136

Ай бұрын

I see, that's why I'm a bit confused 😂

@EAOO

Ай бұрын

@AndyMath all good, love the videos!

@insaneclips1184

5 күн бұрын

Truncated means rounded off. Both are same dear

@EAOO

4 күн бұрын

@@insaneclips1184 no, truncated means you cut off additional digits (usually decimal). So 76.73 would truncate to 76 but round to 77.

everyone is gangsta untill log shows up

@faizaanfazal

26 күн бұрын

True af

@user-tz3mj6ye3t

5 күн бұрын

Perfect comment😂😂

@hasandhrolia8353

Күн бұрын

Kids!!

My mind after 0.00000001 seconds of looking at this equation : Log Log Log Log

@Aman_Gupta0

24 күн бұрын

fr same

@abatall

20 күн бұрын

idek what log is i'm doing alg 1 rn

@yotzexotadrogue

16 күн бұрын

Fr

@progisloveprogislife4501

12 күн бұрын

It's the opposite of exponenciation, your x in a logarithm is the exponent you need to give to the base (10 in this case) so that the result is equal to 80 (which is called the argument I think). Not that hard to grasp as a concept

@chaabomed

9 күн бұрын

Exactly! Log from line 1

India's secondary school students be like,"like, seriously‽."

@tanishthakur7

12 күн бұрын

Really!!

@unknownfbk

9 күн бұрын

Yep, its kinda easy

@Auror2k05

6 күн бұрын

Mein timepass karne KZread mein aaya aur yaha aake yeh problem solve karne baith gya 😂

@evilgaming7860

5 күн бұрын

Even though it is easy for us it may not be the case for whole India. So we should not be full of ourselves.

@shashankyadav5703

3 күн бұрын

So true

Idk why, but this felt like pulling off a combo KO in YuGiOh

@Redawesomeoby

Ай бұрын

Bro why ain't I ever thought bout learning math as learning combos in fighting games dawg

@canonogic

Ай бұрын

@@Redawesomeoby Hadouken to find x 😂😂😂

Before even watching the video I know I'm gonna hear "Lets put a box around it" and "How exciting". Almost forgot the “Nice” every time 69 or 420 shows up. And you can’t forget the “this looks like a fun problem” when the video starts.

@ianyoon7336

Ай бұрын

how exciting

@frankstrawnation

Ай бұрын

This looks like a fun comment.

@outerspacedog

Ай бұрын

it’s pure hype

@mzoxololinda8408

Ай бұрын

And it looks important, so let's put a box around it 😅

@englishsong8399

Ай бұрын

Or one can just use log

Wonderful explanation.This man can teach us faster than a professional professor.

@frommarkham424

Ай бұрын

I think he is a professional

@euloge996

Ай бұрын

He is a teacher

@FylinB563

Ай бұрын

A professor is inherently a professional

@shivambharadwaj9580

29 күн бұрын

Definitely a middle school teacher ​@@euloge996

A video about a list of the usual "tricks" that can be used in such math problems (like the 30-60-90 triangle, the exponent substitutions you used here, etc...) would be amazing! Thanks!

I’m having flashbacks to helping my daughter with Algebra 2 😮 I love how you manage to keep the presentation so brisk, yet also don’t have any mystery steps.

My math teacher in high school wouldn't have allowed log 80 as an answer because it can be reduced like square root of 80 can be reduced. Because it is base 10, log 80 = log 10 + log 8 since log ab = log a + log b if the base is the same. Log 10 = 1, so log 80 = 1+ log 8.

@adwaitpandey2526

Ай бұрын

1+3log2 which is approx 1.9

@gregstunts347

Ай бұрын

Depends, sometimes it’s the opposite. With a class that I was in, they would want me to write 1 + log 8 as log 80. But log 8 on its own would need to be simplified to 3log 2.

i did it by applying log to both sides, and then solving. it makes it easier because after that its just manipulation. but you do need the value for log 2 and log 40.

@vaibhavgupta8681

17 күн бұрын

Need to know just log 2. log 40 would be log 4 + log 10 . Everyone knows log 10 value and log 4 would be 2 × log 2.

An excellent demonstration ! That was clear and easy to follow. Thanks for sharing !

Great video, it randomly appeared in my recommendations and i'm having a test on this exact stuff this week

I tried solving it before the video, ended up with the same answer. I just did the log base 2 of 40 first to get the exponent bases to 2. got something around 5.32. set the exponents = to each other due to same bases and boom basic algebra to get to the same decimal answer. (with calculator ofc) nice video tho man 👍

I usually have the answer in my head before he finishes the countdown. ...then I watch the video to see HIS process and what the right answer is.

What a smart and simple way to solve it by rules of indices 😻

It'd be cool for you to make videos about our ten fingers and base 10 number system versus others like base 12. I'm sure those too would be exciting.

@andymath what kind of training do you do for your deep voice?

I should start writing down these equivalences.

Hey Andy, unsure if you check the comments, but what software do you use to animate your videos? Thanks!

@frankstrawnation

Ай бұрын

He said that a very few videos ago.

I'm used to the ones that share a common base

I checked this equation with gpt, the first answer for x=4. Then I asked to recheck and it was able to find the same answer but using log2

I did this problem a whole different way and still got 1.903 as a answer

x to the a to the b. Whole thing squared.

I got ln(80)/ln(10) but it came out as the exact same thing, beauty of maths, different kinda methods but same answer if you do it right.

You can also be silly and just find 2 to the power of what is 40 (comes out to 5.2319) and then finding x

Easy method here Just take log on both sides and multiply it in side then you should have an equation with both sides having x of power one and substitute values of log40 ( log4 +log10) and log 2 Then u get 1.602x-1.602=0.601x+0.301 On bringing x oneside and constant on other side u get 1.001x=1.903 Which is approx answer x=1.903 If you need more precise then increase the decimal numbers That's it not even a 2min task

@aadityasrivastava16

16 күн бұрын

That's what i was thinking it took me about 1 min to solve this mentally i was like he must have asked a numerical value i solved log 8 ans 3log2 = 3X.30 and i got 1.90

Very amazing 🎉🎉🎉🎉

Fascinating ….!

amazing thank you

yeah, log can work. I just prefer natural log because it looks easier to format in my opinion.

@rathersane

Ай бұрын

But when the base is already 10…

@Grizzly01-vr4pn

Ай бұрын

How (and more importantly why) would you crowbar ln into this?

@Sg190th

Ай бұрын

@@rathersane You can use logarithm regardless but yes, it's usually 10 as base. In this case, it works better. I'm just saying what I prefer in my opinion. Is that bad?

@Sg190th

Ай бұрын

@@Grizzly01-vr4pn Crowbar? Huh???

@rathersane

Ай бұрын

@@Sg190th No… It just seems like more work in this particular case.

much exiting

This could be much simpiler. Use a logarithm to find what exponent makes 2 = 40. Expand that through x-1. Use algebra to find x.

I solved it in seconds just multiplying entire equation with log10 and got answer without calculator. Anyone with log knowledge can do it.

Couldnt u do on comparing powers?

I knew that because I brute forced and put 1 as x and 2 as x and then just did 1.5 and kept raising it to 1.9.... They need to make it a bigger x so that I can't just input numbers quicker than it takes to actually use the correct formulas😅

i used the natural log from the first step

Thank you bro

Indeed that is how is supposed to be done, 👍

How exciting🗣🗣🔥🔥🔥

im so happy that i could figure this one out in the thumbnail itself heh yay

How exciting.

Shouldn't a and b from the LHS and RHS be same?

Doing this myself before watching the video was weird, it didn't feel right to get such a nice result.

You could have done a 2nd level unknown equation to get it without a calculator

Nice

It took a minute for me to slove. Aaah.....

Without using log i some how by unitary method only i got two values of x which are 1 and 4 and this not possible and my method was also not wrong.

Lol i sloved it in my head 😅😅

if you apply significant digits - the answers are the same

As an Asian parent I would say this should be easy for my 2 year old one

Thank you, it is actually really funny !!!!!!!!!!!!

Quite silly, could have applied log base 2 at the outset and just solved thelinear equation.

just introduce logs to both sides in the beginning 40^x-1=2^2x+1 log 40^x-1= log 2^2x+1 power law of logs, the power of the log can become the coefficient of the log (x-1) log 40 = (2x+1) log 2 x log40 - log40 = 2x log2 + log2 move the x terms to the left, and the log40 to the right x log40 - 2x log2 = log 2 + log 40 factorise x from the right x(log 40 -2log2) = log2 + log40 x= (log2 + log40) / (log40 -2log2) = 1.903089987

Because we have 10 fingers! 😂

Решил по формуле Пика за 0,000000002 секунды

Andy!!

''its because we have 10 fingers''

wolfram here we come

I solved it in another way and i found the same result as yours, i am more happy to send it to you if you want to see how

so simple you just know about log 5on2 =2.3 and done and solve it but you can do it simple you should change this log to log5 /log2 => 0.7/0.3 =2.3 (rounded ) and you dont wana calculator or somthing this question was standard for student

Kinda boring, but you can solve this almost instantly using log(a^b)=b*log(a)

@sauten2565

25 күн бұрын

Yeah that’s what I was taught but I guess the way he does it can be understood better by most people

@RealReen

25 күн бұрын

@@sauten2565 true and it also demonstrates far more, useful rules.

@sauten2565

25 күн бұрын

@@RealReen fax, how far have you gone in maths education, like A levels or further?

@RealReen

25 күн бұрын

@@sauten2565 I'm not sure how it applies to your levels, but danish A-level, and I will be having a lot of maths a uni soon.

Approximately 2, right?

I thought it was because we have 10 toes

Why i always want to take log😂

Can I send you a problem?

pls do more about shapes and derivation i had a question asking what is the biggest [ pyramid ] i can fit inside a cylinder pls help me solving something like this i love ur vidsss💓💞😭

It's log more exciting

Take log in the first step; (x-1)(2log 2 + log 10) = (2x+1) log 2 => 2x log 2 - 2log 2 + x -1 = 2x log 2 + log 2 => x - 1 = 3(log 2) => x - 1 = 3(0.30103) => x = 1.90309

@samir2zk135

Ай бұрын

That's more what I was thinking lol, how they show us in school. xd

I got it right somehow 💀

could you also just do x-1(log 40)=2x+1(log 2) and solve that way?

@Abhi-lz6zo

5 күн бұрын

actually It's much easier that way

@Abhi-lz6zo

5 күн бұрын

Log 40 could be written ans log 4+log10.The only thing is we should know the value of log4 and log2.

iIs the reason for that really that we have ten fingers??

why didn't you just ln the both sides from the first ? it would've been much easier.

I'm in 10th class from imdia and solved it very easily

@maincoasters

Күн бұрын

i’m in 6th from the usa and solved it really easily

😂

in the USSR, children solved such examples in nurseries

@samir2zk135

Ай бұрын

IMO childrens thinking capabilities way more powerful. Age won't matter, IG time does.

notegud

Is nobody going to say how easily it could have been solved by using log

I got 1.8 😢

“Log 10 means the same thing as log, and the reason for that is we have 10 fingers” Wh… what?

@joeyd9351

6 күн бұрын

Everything is base 10 unless otherwise stated. I'm not sure if our amt of fingers is the reason for that, but maybe it is

i got x = 1 + 3log2

@Abhi-lz6zo

5 күн бұрын

Log 2 equals 0.30 and 3 times log2 is 0.90 adding one to it will result in 1.90....the answer is same

Can you give me an example of how this is useful outside of math?

@satyadas4751

Ай бұрын

problem solving is a very important transferable skill. Being good at solving any math problem means your likely a good problem solver in any setting. Yes, you won't need to solve this specific equation or anything like this in a practical setting, but it trains your brain to think outside the box

@frankstrawnation

Ай бұрын

​@@satyadas4751Your comment looks important, let's put a box around it.

@stephenbeck7222

Ай бұрын

It’s an exponential function. You can google the purpose and application of those. This is a problem solving channel, not an application and vague question answering channel.

@jan_Masilijun

Ай бұрын

it's exciting

@y00t00b3r

Ай бұрын

that's like asking how is breathing useful outside of respiration.

From 1st sec, i striaght knows that just using ln() then find the x. Just that simple. No need to be simplify🤔 why need sinplify as we can just using ln() loll

that too easy with 16 years old vietnamese people =))

*IMAGINE HOW MUCH NERD GIRL POON THIS GUY GETS*

beautiful maths andy. truly beautiful 🥹🥹

… no clue how I got x = 1

How tf did I get ln40/2ln2

@martinb.3997

Ай бұрын

Now I got ln40/ln2 how tf am I gonna get through university man

@martinb.3997

Ай бұрын

Well now I got the answer but in negative, I guess I'll leave the logarithmic method for a while now

Anyone else found this hella easy?

why don't you apply LOGARITHM on both sides

by trial and error i found 1 then 2 then 1.9. and 1.9 is way way too close. I found in 3rd iteration via calculator. I will take that as ok becuz in real life that would negligible difference, mostly covered by buffer and in real life u won't be fucking sitting there finding value of log 69 or something. Maths doesn't has real life applications beyond class 10 or 12 . Edit: the answer is 1.90309 lol That's 0.16 % difference.

i knew the answer would be in terms of log, so kinda disappointing

There was a really easier way, you could write as (2^ 5.32192809490)^x-1=2^2x+1 ,since both bases are the same we can write down as 5.3219280949(x-1)=2x+1 which is then equal to 5.3219280949x-2x= 5.3219280949+1 then x= 6.3219280949/3.3219280949

(Ln80)/(Ln10) gang

Did he do this one right?

Now without the calculator!

@editor_R3

Ай бұрын

If someone knows how log works it will be possible

@richardl6751

Ай бұрын

@@editor_R3 Find log table.

@ChaosPod

Ай бұрын

Unless you have old fashioned log tables and know how to use them it's unlikely.

@dow_wob

Ай бұрын

you can solve it without calculator see my comment

@dow_wob

Ай бұрын

you should just know about simple log

No base drop = thumbs down

Who solved this problem without using pen like me 🗿🗿😎

@aryawijayaa95

8 күн бұрын

Yes i solved it,without seeing it😎 No u are lying i didn't believe

@praveensrivastava.5253

8 күн бұрын

No bro, I'm studying in class 12

E Z 😅

If we are allowed to use the calculator, then we can simply type in the equation on a scientific calculator and get the answer

@iamsuperior.45

Ай бұрын

That's not the point lmao

@frankstrawnation

Ай бұрын

But that wouldn't be exciting.

@duccline

Ай бұрын

that's just an approximation.... the point is to find the exact value, not a decimal approximation

@frostgamingyt7326

Ай бұрын

@@duccline I found the value that he found lol