I used this series to brush up for the GRE. I know I was good at this in High School, but after several years without using it, it fades away. Thank you so much for the resources!!!!
This is great but I think showing that you're taking the square root of a number is how you're getting to your answer would help. Also, a quick review of how to take the square root of a number would probably help some people. I really liked the variety of problems you showed. Thank you.
this guy is so good! I've struggled with, and hated math all my life! it's never made sense to me and now i'm actually kind of enjoying it! thank you so much! this helped a lot!
I'm so grateful for your videos! I have a professor that don't even use the stupid books so I juts can't even have a point of reference, By the way I'm doing introduction to physical scis, so any kind of advice will be greatly appreciated! "Because unless I find the way to study better than listening to his lectures that he preach on plain memory! I believe that I may flunk this period.
41 going through it trying to understand my college algebra instructor. I decided to study alone. I find it hard to be instructed by others and this helps me pace myself on my own time. He is very clear and understandale!!!
(Like)(Like)(Like) = like to the third power. You get to the ROOT of many of the problems people have with FRACTIONAL and NEGATIVE exponents. Therefore I give this video a very POSITIVE rating!
Thank you! I have forgotten all this stuff from school, but now my kids are doing Algebra and Trigonometry, so I am trying to understand their homework so that maybe I can help them. I've also got my kids doing Khan Academy. It's fantastic.
instead of (4/9/^1/2)^3 can it also be written has (the square root of 4 parenthesis to the third power over the square root of 9 parenthesis to the 3 power? Im referring to the end of the video 8:53. thank you, very helpful by the way!
Thanks salman! I understood level 1-3 exponents already but i just wasn't very smooth and it wasn't very intuitive but after watching your vid about 3 times i am now an exponent expert.i hope...XD
1st Because of the negative put it all under 1(this cancels the negative exponent): 1/(36c^4)^3/2 2nd Re-write the equation to 1/(36c^4)under the radical to the 3rd power 3rd Simplify what is under the radical to get 1/(6c^2)^3 4th Distribute the exponent to get 1/(216c^6). This*
@iSmiffy95 There are three negative numbers being multiplied there. If u multiply a negative by a negative it gives you a positive but since there are three numbers there's another negative number left. so the sum of a negative into a negative is positive so a positive multiplied by another negative is negative. :) Hope this doesnt confuse you even more. :)
Hi, Your math presentations are very good. They will help the students, who are afraid of raise questions in class, consult them and learn by him/herself. At the beginning of this presentation, if you say that "4 to the power 1 = (4 to the power 1/2) x (4 to the power 1/2). That's how it becomes 'which number times itself equals 4?", then the intuition may become a bit clearer. :-) Anyway, it's great effort.
my math teacher ALWAYS thought i was to stupid to get an A so i decided to actually study for my next test and at the time i was never paying attention in class i never understood what we were doing in class so i asked my friends to teach me wat they learned and i thought they sucked at teaching... so i found this and BAM!!!!! i actually got a B+ on my test usually i got Ds and Fs. u shoulda seen that look on her face!! but at first she thought i cheated >:(
@ismiffy95 so glad you asked that question, so the reason why you'll get a negative is think of it this way. A negative times a negative is a positive so in that case. -2 times -2 is equal to positive 4. But, you still need to multiply to another -2. so positive 4 times negative 2 is equal to -8 :)
At 7:40 can't you just figure out what the answer is if the exponents positive then put the answer as the denominator of the fraction and get the answer for a negative fraction exponents
We know that 3/2 is 1/2 to the 3 power because if you go backwards 3 × 1/2= 3/2. He factored out the 3 so the steps could be followed a bit better. In this cause you would square root then raise it to the 3
This factoring out part is what throw me into state of confusion. Understanding the logarithms is what helped me tremendously. Thanks for taking your time to answer!
This video was literally uploaded when youtube just got created.
This shows how long khan academy has been around for.
yep and he still helps! since I was born lol
Same here, after all these years; I still got useful information from this video. Math don’t change.
"I'm gonna give you another problem" lol sounds like a threat.
Brilliant teaching
Ikr? Him and Crash Course are the best at what they do (In my opinion)😊😍😎😎👌✌
I used this series to brush up for the GRE. I know I was good at this in High School, but after several years without using it, it fades away. Thank you so much for the resources!!!!
Simple, Clean and Clear. This is what education should be about.
before, i would say the word exponents is difficult to understand but then i saw this, it would be so easy now for me. thanks for ur video. :)
u are a perfect Teacher. U know how to explain things coz I believe u think on students' perspective and that's the key. Keep it up.
Holy crap, this helped me SO MUCH. Thank you thank you thank you
This is great but I think showing that you're taking the square root of a number is how you're getting to your answer would help. Also, a quick review of how to take the square root of a number would probably help some people. I really liked the variety of problems you showed. Thank you.
this guy is so good! I've struggled with, and hated math all my life! it's never made sense to me and now i'm actually kind of enjoying it! thank you so much! this helped a lot!
LOL i am glad to know i am not alone. I am a graduate in Computer Science i always had bad basics in maths, now improving my basics
@@informativecontent4778How is your level in mathematics nowadays?
I'm literally having to review EVERYTHING for college. I've been watching these videos for an hour now😫
good luck 😙✌ im in 7th grade so im learning it but still
Hahahahahah same tomorrow is my entrance exam for my college wish me luck🤣
@@nib10 how did it go?
He explains exponent rules so clearly !! thanks God i saw this video!
Thank you -- I love your videos -- they make things so clear!
11 years old!!!
12 years old!!!
15 years old!!!
I can't resist...don't mind but are u still there?
How old r u now? How was life?😅
@@Msi696 lmaoaoao
Heaven sent me an Angel!!!! Thank you soooooo much!
Thanks I understand my math homework because of you !
Fam this video is older than me and it’s still helping me
I just want to let you know thank you soo much for theese videos.
Your voice... soothes me..
I'm so grateful for your videos! I have a professor that don't even use the stupid books so I juts can't even have a point of reference, By the way I'm doing introduction to physical scis, so any kind of advice will be greatly appreciated! "Because unless I find the way to study better than listening to his lectures that he preach on plain memory! I believe that I may flunk this period.
OMG!!!! this helped me so much. Thank you
This makes so much more sense thank youu!!
Its really difficult at first but super easy after looking at this! But it takes time to understand....
41 going through it trying to understand my college algebra instructor. I decided to study alone. I find it hard to be instructed by others and this helps me pace myself on my own time. He is very clear and understandale!!!
Wow, this is very easy to follow. Thankyou!
Ikr? Great content!
Oh man, I cant handle the fact this doesn't satisfy my intuition and I'm highly intuitive!
(Like)(Like)(Like) = like to the third power. You get to the ROOT of many of the problems people have with FRACTIONAL and NEGATIVE exponents. Therefore I give this video a very POSITIVE rating!
Thank you! I have forgotten all this stuff from school, but now my kids are doing Algebra and Trigonometry, so I am trying to understand their homework so that maybe I can help them. I've also got my kids doing Khan Academy. It's fantastic.
last problem was very helpful, thanks!
You make VERY good videos and videos I love! Keep making more!
You’re videos are awesome they teach me so much
instead of (4/9/^1/2)^3 can it also be written has (the square root of 4 parenthesis to the third power over the square root of 9 parenthesis to the 3 power? Im referring to the end of the video 8:53. thank you, very helpful by the way!
You just Blew my mind...
@prisat32 you cannot have a negative exponent, so you must bring it to the top or the bottom depending on the initial location if it is negative.
Thank-you so much :) My teacher didn't explain how to do these at all...
yo, im in algebra 1 and im learning algebra 2, i feel proud of myself lol
how old are you now
@@bhoxzivanlangnamanpfhoe7869 13 years ago but this guy just skipped Geometry ..
this is why i love him :)
The way you explain is hilarious! It's so simple...
I just want to let you know that you save my butt gazillion times and I thank you for that.
Thanks salman! I understood level 1-3 exponents already but i just wasn't very smooth and it wasn't very intuitive but after watching your vid about 3 times i am now an exponent expert.i hope...XD
I'm 14 and he makes the problems very easy for me :)
Thank you so much.
1st Because of the negative put it all under 1(this cancels the negative exponent): 1/(36c^4)^3/2
2nd Re-write the equation to 1/(36c^4)under the radical to the 3rd power
3rd Simplify what is under the radical to get 1/(6c^2)^3
4th Distribute the exponent to get 1/(216c^6).
This*
Thank you this helped greatly ❤️
Thank you. I needed a refresher.
brilliant👌
#Khan Academy The Goat
Thank yoy for another great tutorial on exponents.
for the problem -8 to the -1/3: the answer can be 2 as well since there is negetive 2 in the denominator. right?
omg this was uploaded more than ten years ago
13
Ohh you commented 4 years ago
Dude this is so old it was out on2006
I think it easier to say with fractional exponents, the denominator is the square root, and the numerator the power (or exponent) of the number.
I putting this info into lyrics for kid thanks for making it simple The Ambassador of Educational Lyrics .
Melton Henderson Could you share the lyrics? I'm curious haha
Yeah coming soon
Just put lyrics up exponent with the same base
Helpful=😊
and it isn't like he found a cure for cancer.
@iSmiffy95 There are three negative numbers being multiplied there. If u multiply a negative by a negative it gives you a positive but since there are three numbers there's another negative number left. so the sum of a negative into a negative is positive so a positive multiplied by another negative is negative. :) Hope this doesnt confuse you even more. :)
Hi,
Your math presentations are very good. They will help the students, who are afraid of raise questions in class, consult them and learn by him/herself.
At the beginning of this presentation, if you say that "4 to the power 1 = (4 to the power 1/2) x (4 to the power 1/2). That's how it becomes 'which number times itself equals 4?", then the intuition may become a bit clearer. :-)
Anyway, it's great effort.
how do you get rid of the -1 in the expression e^t^-1 ??? it's for differential equations
"And now I'm sure I've confused you let's do some more"
This was very helpful! Thank you!
i'm 57 and find myself having to learn it, to help my kids get a better ACT score for college..
this video is ancient
+TwiZted Corners Okay, So do you want to update it to Common Core?
I've watched this on my Commodore.
No u
@@chestnut688 No u
One can teach this lesson after 100 years and will still be true
i wish all of my teachers were like khan
Thank you xD I needed this!
Awesome!
As an Indian 8th grader, I think I can Speedrun this in a day.
what is the technique for doing a sum like 8 1/3 ?
what if i get a question such as 135 1/8, how will i be able to do that?
I was being born when this was posted...
Watch this at 2x speed, it skips over his uhhs and umms and makes for a smoother experience
@ khanacademy : Please make a vid on partial exponents for fractions - like 8^1.35
You're right you have confused me at that point hahaha
this is helpin me get A's and Gals
what grade is this for?
6th grade kids
my math teacher ALWAYS thought i was to stupid to get an A so i decided to actually study for my next test and at the time i was never paying attention in class i never understood what we were doing in class so i asked my friends to teach me wat they learned and i thought they sucked at teaching... so i found this and BAM!!!!! i actually got a B+ on my test usually i got Ds and Fs. u shoulda seen that look on her face!! but at first she thought i cheated >:(
for the (8/27) to the neg. 1/3 problem: would 1 over 2/3 be correct also?
What about if they use algebra and not numbers?...
And you lost me
thanks i learned a lot. can u pl try to rite neater
@ismiffy95 so glad you asked that question, so the reason why you'll get a negative is think of it this way. A negative times a negative is a positive so in that case. -2 times -2 is equal to positive 4. But, you still need to multiply to another -2. so positive 4 times negative 2 is equal to -8 :)
"Thoroughly melt your brain" lol
At 7:40 can't you just figure out what the answer is if the exponents positive then put the answer as the denominator of the fraction and get the answer for a negative fraction exponents
thank you so much
All nice and well but in the last example 4/9 to the 3/2 power (step 2), how do we KNOW that 3/2 is 1/2 to the 3rd power ?! Anyone ?
We know that 3/2 is 1/2 to the 3 power because if you go backwards 3 × 1/2= 3/2. He factored out the 3 so the steps could be followed a bit better. In this cause you would square root then raise it to the 3
This factoring out part is what throw me into state of confusion. Understanding the logarithms is what helped me tremendously. Thanks for taking your time to answer!
finding the square root of 60 is not easy in your head, you can find it by guessing and multiplying but it's easyer to use a calculator to save time
Teacher of the Year - DEF!!! but Nobel Peace Prize, why (sorry I'm confused)???
@babarfirasat if you got 135 1/8, then you do 8√135. (8 is the index). then you just work it out and you get 3 8√5. (again, 8 is the index)
what about problems likes 16^(1/3) this would have to be a fractional answer. How do you answer questions like these?
I understand the steps unfortunately i don't understand the reasons hopefully you've made a video at some point
how do you do these??? (36c^4)^-3/2 ?????
why did the negative go to the bottom of the fraction from the top at 7:14 ?
I learned in 1 hour from sal than I did This whole school year
this helped a lot. thank you. You really saved my skin
this helps me
Where would a handsome chap like myself get these level 3 practice problems? Ive had a look on the Khan website but cant see them :S
...the fact that you wont fail your math test
sure got that right
Yea I understood all the other videos till this one. and you keep your fractions top heavy aren't you supposed to spin them down?
Why is it every time he gets the answer 27 i cant stop laughing.
i was very confused before the end D:
my brain IS meltingggggggg....
but at least its melting AFTER it got the problem.....
maybe i should write this down ?
this isnt in my math book.....