Volumes of Solids of revolution (1 Viewer)

[hit patel]

Hey guys I am doing ok in the integration and finding volume part but the hard part seems to be visualising the solid formed when the f(x) is revolved. So for example what would y= x^2-1 look like when rotated about x axis and y axis? Its hard to visualise this. The integration is simple as soon as you can see the solid formed. Does anyone else face this?
Any suggestions or solutions?

Thanks

 

[braintic]

Assuming you are talking about 2 unit Volumes, there really is no need to be able to visualise the solid, provided you can correctly identify the region which is being rotated.

 

[hit patel]

3U Volumes is the one i am talking about. Please help *bump*

 

[obliviousninja]

Hey guys I am doing ok in the integration and finding volume part but the hard part seems to be visualising the solid formed when the f(x) is revolved. So for example what would y= x^2-1 look like when rotated about x axis and y axis? Its hard to visualise this. The integration is simple as soon as you can see the solid formed. Does anyone else face this?
Any suggestions or solutions?

Thanks

Two at a time?