Determining the derivatives of simple polynomials.
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@iamtheplauge That happens a lot in my class. At least with computers and online videos you can go back and correct mistakes…
Sal, you are a beast.
I am planning on majoring in math and i was wondering what are some of the hardest math courses in college? Congrats for everything you do. Note: if i were a billionaire, i’d donate millions of millions to your academy and you since you quit your job in 09 
Sal, you are a beast.
I am planning on majoring in math and i was wondering what are some of the hardest math courses in college? Congrats for everything you do. Note: if i were a billionaire, i’d donate millions of millions to your academy and you since you quit your job in 09 
Your voice is awesomely calming..
“f(x) equals to – this pen drives me nuts!”
xDDD
Lol, his pen messes up through the entire thing and I still learn a ton.
In the classroom one tiny mistake distracts the class for at least the length of this video.
are you a programmer? i never heard the word “decrement” outside programming
You know that feeling when you understand something in maths?
Yeah, it was a bit uncommon to me.
i love your videos. thank u so much. your helping me get thru college!
the main point is, you learn something better than school.
no matter what is behind this.
I am not even going to take calculus for about another 2 years now and I now already understand the basics of limits. Thanks so much Sal, I learn so much more on one series of your videos than throughout most of the school year!
So many comments of thanks, but I feel the need to add mine as well.
Many thanks for taking your time to spread free education, especially on such a vast scale. It is truly a marking point in the evolution of man when learning becomes viral. It truly marks a point in the evolution of man, as we approach perfection. What an honor Mr Khan.
this is so fucken amazeing!! I HAVENT STARTED CALCUS YET!! just wanna say “FUCKEN BITCH!!
That was pretty clear
Thank you so much Khan
woah i actually understood that… and im only in geometry
my calc teacher sucks mjaor sack. ur vids are what will get me through lol. everyday after class i watch ur vid about what we covered and in 10 mins u can make sense of what he couldnt in an hr. thanks and keep making vids!
@antonb123 not to mention you can choose when to go to school:)
This helped me so much I’d buy you a pen!
you calculus videos helped me gain a better understanding of the topic. i seriously can’t thank you enough for what you are doing for those such as myself who need help.
OMG I SAW THIS VIDEO AND REALIZED HOW EASY AND NOT COMPLICATED THAT IS.. I LOVE YOU MAN *teaar* !
Thank You, Thank You, Thank You!! I was so freakin lost in my calc class until I saw ur youtube videos!!
This guy should be everyone’s teacher, because the learning is supreme to any other
Even for me who doesnt have english as a main language!
6 retarded professors are pissed at khan
@nfarboody
Archimedes and some Indian & Chinese mathematicians would greatly disagree, this Newton individual is extremely over rated and credited, even after the great Albert made him look like a retarded chimp.
i think i will publish a paper called General Relativity tomorrow, and claim Mr Al stole my ideas.
I will also claim i came up with much of the works of the greatest minds in history, Alhazen & Al Khawarizmi and Archimedes, then the Anglian culture will claim i’m the greatest!
Notice that if you take the exponent of f(x), let’s say f(x)=x^2. You can take the exponent, 2, and multiply it by the coefficient (which in this case is 1). You get 2x. Afterwards, you subtract 1 from the original exponent (2-1=1), and that’s the exponent for the derivative of the function.
Thus, 2(x)^2-1=2x and f’x=2x. Try using this much easier technique and you will ALWAYS get the same answer.