Please help (1 Viewer)

[kpad5991]

https://imgur.com/gallery/lODhz

Find the volume of the solid generated by rotating the region about the y axis. I get 2 Pi u^3 but the solution is Pi/2 u^3

 

[InteGrand]

https://imgur.com/gallery/lODhz

Find the volume of the solid generated by rotating the region about the y axis. I get 2 Pi u^3 but the solution is Pi/2 u^3

What was the integral you obtained when trying to calculate the volume?

 

[kpad5991]

What was the integral you obtained when trying to calculate the volume?

This is what I got.

https://imgur.com/gallery/Zvbc3

 

[InteGrand]

This is what I got.

https://imgur.com/gallery/Zvbc3

You have the correct integral and correct antiderivative. You have just made an error in evaluating



So you can have another go at evaluating this (carefully). Make sure to get all signs right when evaluating it (you have a sign error in your fourth-from-last line).

 

[InteGrand]

 

[kpad5991]

Thanks I'm such an idiot silly mistake

 

[kpad5991]

You have the correct integral and correct antiderivative. You have just made an error in evaluating



So you can have another go at evaluating this (carefully). Make sure to get all signs right when evaluating it (you have a sign error in your fourth-from-last line).

Can you please check where I'm making a mistake for this question below.

https://imgur.com/gallery/elmgK