Volume of Revolution about the x-axis (1) : ExamSolutions

Tutorial on the volume of revolution about the x-axis.
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[@RShahProductions]

Your software is way more powerful than I thought it were and you seriously have proved yourself the pro for exploiting its features.
All I thought was when watching this "now how the hell am I going to make notes on this?!"

[@adn17]

So gently, greatly and awesomely explained.
You are great sir, i'lll never stop saying that!

[@wyrwshwsrey463y]

omg you just went 3D and it blew my mind

[@avtaras]

Haha yes Ikr
Isn't volumes of revolution the single most satisfying further maths topic out there?
So easy to conceptualise, so sexy, so visceral... 3D.

[@skilly91]

Great video, well explained, easy to follow, and bizarrely great quality graphics. I'm surprised and relieved to find a video on this topic, before my exam, as it seemed a little niche. Seems not. Cheers

[@ExamSolutions_Maths]

Once again then, thank you for your support.

[@RShahProductions]

Great to hear.. I genuinely hope it helps cover your costs!

[@rathnayake7947]

Thank you so much..😍😍😍

[@ExamSolutions_Maths]

Yes it is monetised!

[@al-anoud-123]

Well explained, thank you so much ^^

[@avtaras]

Al-3adoud mo7ammed?

[@RShahProductions]

Btw I'm sure you already do but if you don't, please tell me you monetise these videos on UA-cam?? Every little helps and that!

[@adn17]

By the way, Sir, which program(s) do you use?
Just impressive! Thanks

[@marko.rankovic]

Really fun intro, which software did you use to have these 3D shapes rendered? I'm guessing Wolfram's Mathematica? :D

[@ExamSolutions_Maths]

Marko Crush Autograph

[@Burningarrow7]

Thank you sir, you help students like me who cannot attend an actual college. You are greatly appreciated!

[@halimabegum4630]

i was wondering where the link was for the question where you find the volume of revolution between a line and curve. Can someone give me the link please?

[@mahmoudm451]

why din't we use the (ax+b)^2 method??

[@ExamSolutions_Maths]

Because it wasn't an (ax+b)^2 type

[@mahmoudm451]

ExamSolutions I mean can't it be (x^2 +1)^3/3*1 ??

[@ExamSolutions_Maths]

Mahmoud Matar No.

[@mahmoudm451]

why? :S sorry for asking alot

[@ExamSolutions_Maths]

Mahmoud Matar Because if you differentiate it, you do not get what it was that you were trying to integrate. You get 2x(x^2+1)^2

[@rosette_renah]

Hey,,, this is the second video about revolution,,bh i wanna ask,is it a must to draw the solid of revolution in the exam?

[@ExamSolutions_Maths]

Hi Rosette, no you will most likely not be required to draw the solid of revolution in the exam.

[@rosette_renah]

@@ExamSolutions_Maths oooh ok,,thanks

[@captain_daniel9y631]

How did he get 2x^2 when expanding the brackets?

[@Ghostypods]

he rewrote (x^2 + 1)^2 as (x^2 + 1) * (x^2 + 1) because that is another way to write it and is easier to distribute

[@ponyonoodles6568]

So when I thought this was really complicated, all I actually have to do is remember the formula... ._.