Introduction to logarithm properties | Logarithms | Algebra II | Khan Academy
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- Опубликовано: 2 окт 2024
- Introduction to the first two logarithm properties.
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Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions...but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you!
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"I don't know, I don't the names of things."
This man knows exactly how I math.
Same lol
"Let me do a more cheerful colour..." Picks blood red.
Anyway, great videos!
its pink, not red are you color blind
This made me laugh out loud.
Whether he picks red or pink, red is considered cheerful. That’s why Coca Cola, Netflix and other companies have red in their logos.
Hello
@@elisevicino4093 it's still a pretty vicious pink with the black background and the pixels.
captured in stunning hd
NNJAx you gotta adjust to this man, it was in 2007
I can't believe that video tech has come so far in only 10 years!
the thumbnail was good though.
lul
@@muhammedshameel5684 You can change a thumbnail post-upload, they went through and standardized their thumbnail style recently. Back when this video was realeased, you could not upload your own thumbnail, you had to chose an automatically generated screenshot from the video
your voice soothes me
Christian Aleman
Woah man 🤔🤔🤔🤔🤔🤔🤔🤔🤔
Christian Aleman 69th like
you teach better than 90 percent of teachers today
That's probably because the teachers are forced to teach in a certain way, and their timed. While this amazing guy can take his time and do as many takes as possible with no noise, or distractions.
No not really
@@siddharthgupta1866 You're dumb.
Much higher than 90 percent
Bro what do you mean by 90%
He is at minmum better than 99.99% of the teachers
I’ve been watching and learning from khan academy videos for years. I’ve always found it incredible that Sal, a MIT graduate, who’s clearly a genius, chose as his life’s mission to help educate others. I’m a teacher and tutor myself now and he’s been an inspiration to me. 😊
Because of your videos I'm able to study for finals in 2-3 hours
So I am not the only one, o.O thank the lawd for khan academy! XD
Exactly what I'm doing right now 😂
amen, lol
wow are you in 7th grade or something
"What do they call this? The additive exponent... I dunno, I don't know the names of things..."
Right? It's like he doesn't know he could practice teaching the lesson and look up those details BEFORE posting it.
+Craig Smith He is teaching a concept, and if you are interested in it, a further study into it should be mandatory. I for one, have trouble remembering the names of things when there are hundreds, especially in this. Names are only used to convey meaning to others. Concepts are more important.
Craig Smith Honestly, I was just happy that he's prepared to admit that, to a certain extent, he knows that he doesn't 'know' what he's talking about.
Trying to remember things in general is not what I'm talking about. I'm talking about being prepared for a publicized presentation...even retroactively. If he can't pull some term off the top of his head, who can blame him? But after having failed to pull said term, he publishes a video without it?? #lame
He has a website you know. It' called Khan Academy. If you sign up for it (it's free) you get full on lessons for every single math problem you can think of (at least up till Gr. 12)
We all are only interested because THIS IS NOT SCHOOL. THIS IS RUclips. Learning about girrafes pooping is interesting on youtube
In his defense, there is more to life than giraffes pooping. And the magic of RUclips is that YOU get to choose what videos to watch. :-)p
like fire farting
And there are no annoying classmates nor those classmates who distracts you with their quirks. Also, in classrooms the teachers teaches a lot of students so the teacher couldn't focus on only you. And you can't make the teacher repeat what she/he had said or make her stop/pause just because you didn't get it. In youtube you could reply the video all over again until you could understand it
truuuuuuuuuuuuue
This video and i are the same age and here i am. what a treasure
Idk who this guy is, but he just saved my freakin life!...the way he explains things is just perfect, it registers in my brain perfectly. and I'm just so pleased to have found this youtube channel.
Just search up Khan Academy on a website to sign up for free. :D
I laugh every time he says "I DONT KNOW" becuase ME 😂😂😂
Its funny how my teacher cannot teach us in 60 minutes but this guy taught it to me in 10. Thanks so much!!
Doesn't help when the annoying kids in the class ask to explain it ten more times, even though they clearly understand what's going on...
My teacher goes so fast. I just montaged videos of logarithm from khan academy and he explained it so much better in about 2-3 hours than my teacher can in 6 classes (6 hours). :/
I don't know your class but let's say there is 25-30 students in your class and your lectures are 1 hour long each. It is very hard to explain this to 30 students in one hour sessions and have them all understand it. There difference with you watching this video however, it is like the video is teaching you and only you when you watch it. You can also replay the video or watch it as many times as you want, therefore you will understand it better. Does that make sense?
My teacher directly combined all the laws and I was like "What the heck happened?" Thank you Khan :)
I died a little inside when he said computer science majors should know that 2^8=256 because I didn't know that.
whatttt- i thought in computer science u learn about ASCII code and the teachers talk about 2^7 and 2^8 a lot lmao or is it only my skl
These videos are really useful, but it would be nice if the older ones were reuploaded in higher quality. If it were 480p or something it wouldn't be much of an issue, but at 240p they're actually difficult to read at some points.
240p! Those graphics! Crystal clear!
But really, this helped so much! My math teach would draw these stupid arrows to describe the rules instead of saying, "When x happens, this goes here. When y happens, this goes over here." I didn't really like the arrows, and this is way better. Thanks.
@Suani Avila they do be pointing doe😳
i missed algebra class today. thank you so much for getting me caught up!
Something I never understood for the whole year, he taught in one video :)
do you have more videos on logs ...I never cared for maths as much as I do now only 20 years later. iam revisiting all modules .. you have done a great great job
Atul Sharma there are other vids on youtube, just look
God bless you !
and if you can help me pass my class, I WILL worship you.
The way you explain . . . is heavenly
can i ask, though, why the 81 was thrown into 1/81? i'm not sure i understand. did the negative distribute to the second log?
W0 you teach 5 times better then my teacher thank you so much.
thanks that was very helpful, you sure explained it a lot better than my teacher!
My stupid teacher made it look complicated and got confused but this guy makes it look simple amen to you
Thankyou man for this video, really useful. The problem is i TOTALLY know the mathof the powers and its [rp[erties. But i don't have any idea for the logs with base no.s, no idea how to solve them. I read many articles and tutorials on this, almost all is telling more complicated and extra bullshit. Thumbs up bro.
thanks khan am learning alot here
i hope we wouldn't need schools anymore. this is a better form of progressive learning.please also include some problem to solve and create competitions so that it may become a school within itself. maybe you could accredit it someday. Thanks again.
very cool video Sal - thank U for helping me with logarithms.
Thanks, I passed my test
im cranking some khan academy and then all of a sudden I see this video itt seems so old I find its made in 2007 like bruh this man has been doing this since 2007 its come such a long way
my brother was too lazy to teach me logarithms because were going to vacations and im gonna miss my weekend algebra 2 class, so my first destination is khan academy
Nice man, this is very very very good, i mean very very very very good, like seriously VERRRRRRRRRY Good
Teaching quality is inversely proportional to video quality
I'm so thoroughly amused at a new method to add 3 to 5. Who needs simple addition when we have logarithms!
Let's have a much more cheerful colour!
*chooses bloody red*
very helpful.
Him: im not doing this because i know 3+5 is equal to 8 im doing this independently
Me: Right....
this man is a babaji who likes cheerful colors . saved me from the boring blackboard and my half knowledged teachers.
126 dislikes are by commerce students
omg! magic!!
how can this video get dislikes,,,,. in fact all of Sal videos shud have 0 dislikes . curse the 8 people who dont understand the knowledge of Sal
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please
Need to show this to my maths teacher to show how its done!!
How come you divided with the minus sign and on the next example you multiplied 1/9 . 1/81,
LLsolarg one of the exponent properties states that if you divide 2 numbers with the same base you subtract the exponent. For example 2^3 / 2^2 = 2^3-2 = 2^1. It makes sense since 2^3 = 8 and 2^2 = 4 and 8/4 = 2. It's the same thing with multiplying with the same base except you add the exponents.
Can you reupload this with better quality? I can't make out what the screen says.
If they could make it out 13 years ago, you can too!
I'm sitting here before my math exam in college going over this. I've struggled with logs since day one with my math professor and you cleared everything in 10 minutes. Thank you SO MUCH!
You didn´t learn the basics of logarithms before college?
i thought you were supposed to learn logs in algb 2 or before if u skipped
Good work, I think my teacher is throwing some of these on the final and we never covered Logarithms. This helps a lot.
r u still alive
It's still helpful!!! ❤️ ❤️
Good luck hun hope all goes well! Though it is the end of the year ... But there aways is a next year hahahah
Please give links on where we can find these proof videos :D
Thanks Sal, I am very happy to with what you are really doing dude. Thanks a lot.
i wonder if you know how much you help people khan. :
but if you'r dividing 1/9 / 1/81 shouldnt be 81/9 so log3 (9) = 2?
Fernanda Rodriguez No, he's multiplying 1/9 to 1/81.
I know this comment was made a long time ago, but I can't resist answering.
If you look at those numbers, he got 1/9 and 81, and he's dividing 1/9 by 81, which can be rewritten as 1/9 x 1/81 and equals 1/729.
But 81 is a whole number so it is equivalent of 81/1. (1/9 x 81/1)= 81/9 = 9 so log base 3 of 9 is equal to 2.
thank youuu
i wish m y teacher could teach like this
by the way I am from india in std 8th ,does all your school teachers are this good?
Great video
do we go to the same school or is this a national problem
Watching this on my 4k TV lol
I thought you add the exponents with the same base (example 1)?
If you don't already know it - YOU ARE THE FREAKIN MAN!
why log3^81 = log 4? I'm thinking if that is 64? not 81 correct me if Im wrong tnx
Casually struggles with homework while I just "learned" this today
(is using blue)
Let me switch to a more cheerful color.
(switches to red)
The video was uploaded in 2007 😲😲😲
this guy is incredible, i don’t even know why but I just like listening to him. He’s pretty funny
i love your teaching but i wish your screen was not blurry. could you use a better smart board.
yeah i too noticed that but he teaches far better than my school teachers ,I am from india btw
@@azadpankh4821 yes he’s a great. I like his communication in detail explaining.
Where do you get 16 in addition to 8 times 32?...
Good
4k?
You have saved me from my bad math teacher!
I cant understand how did you get 16
Being homeschooled, it's hard to have some one go in detail with mathematical equations. Luckily, we have Khan :D
2007?? Where have I been!!!
Khan dude.....you rock man!!! Thanks!!!
This is like homeschool for free
I'm in grade 5, wat am i do'n with ma life?
Asher Lundell i'm asking myself the same, but i mean, i've been hanging around here (generally youtube) since 2nd grade, i'm currently in 9th, still here 😂
Getting a jumpstart for high school, good on ya mate!
@@littlemisslouis1856 lol
Clarifying. Thanks!
This was great it really helped
When would we use these properties?
5:40 shouldnt it be 4^3+5?
14 yrs ago
Thank you
where are the videos of teh demostration of the properties?
Shouldn’t
2 cubed • 2 to the power of 5 = 4 to the power of eight?
No, you don't multiply the bases.
so if i had the problem of wanting to know how many years a machine would take to drop its value i could do this?: 100 000 = 150 000 * 0,88( exponent x).. To find out, i could do like. log(100 000/150 000)/log0,88 = x, to get it? The reason for using it here would be to find out what the exponent is (meaning the number of years in this case)?
😂wow that time I was 5 year
Khan Academy was founded in 2008, then how this video is from 2007
It was probably in development when this was uploaded. Kind of a test video.
If you were having serious trouble where you were hopeless, you'd be head over heels for him too. Don't hate :P Do what he does to boost your own confidence if you want this kind of attention ;)
Cool
thx m8, I'm in yr12 and that was a harder example than I do in class, that last1left4u is just dumb, you've really helped me and the day before my exam, thx bud
Holy badass. Not a single person of the 303,000 people disliked this video. Call this Christmas 2.0 cause I think Jesus has just been born again.
Really good site for revising our basics which we learnt in schools. Thanks Man
Hey
your video about logarithm does not contain the full basic program
the video is very good but
I have been searching for exercise of the type
Given that log 4= 0.6202
log5 = 0.699
find log 500
it's so terrible
please make a video
Please