Why is this like this? (1 Viewer)

[Run hard@thehsc]

Anyways would you have to multiply the volume of revolution by two to account for the positive and negative root of the function?

 

[mmmmmmmmaaaaaaa]

No, as seen through the formula below, when rotating about x-axis, you use a 'y^2'.
- All you need to do is divide by (x^2+4) and use y^2=9/(x^2+4) to get your answer


Hope it helps

 

[5uckerberg]

View attachment 35439
Anyways would you have to multiply the volume of revolution by two to account for the positive and negative root of the function?

I reckon your question came from a place of anxiety because when you saw the x squared and y squared you were like huh what do I do.

Fear not because all you have to do is use the formula from a cone and then notice that the axis of rotation is the height and the axis that is perpendicular is the radius.