Generalizing disc method around x-axis | AP Calculus AB | Khan Academy
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- čas přidán 7. 01. 2013
- Generalizing what we did in the last video for f(x) to get the "formula" for using the disc method around the x-axis. Created by Sal Khan.
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Generally, if someone would've given me this problem, I would've had to look up that formula you got at the end, but thanks to the first video, I don't even have to memorize or look it up. I know now exactly what to do, and I can use that information and way of thinking to solve problems that are completely different. Thank you, it helped quite a lot.
When f (x) = x and the lower bound is zero, this becomes a proof of the volume of a cone. V= pi * (r ^ 2) * (h / 3).
Wow I was just studying this yesterday... and then I see this in my inbox! Perfect, thank you!
I hit send too soon. Volume of a cone formula: h is upper bound of integral, and r is f(h).
LYK OMG FYRST
I recon he uses a tablet of some sort.