Quick question... pls help (1 Viewer)

[mkv_86]

Integration:

When do I use disk method to calculate volumes of solids of revolution? Is there a specific reason why I should?

 

[pikachu975]

Isn't that just the derivation of the normal way of integrating?

V = pi (integral sign) (f(x ))^2 dx

 

[mkv_86]

Isn't that just the derivation of the normal way of integrating?

V = pi (integral sign) (f(x ))^2 dx

No i mean this method where u do R^2-r^2 and then integrate

 

[D94]

No i mean this method where u do R^2-r^2 and then integrate

Not necessary in 3U.

 

[pikachu975]

No i mean this method where u do R^2-r^2 and then integrate

What does the R and r represent? Radii?

 

[InteGrand]

What does the R and r represent? Radii?

Basically inner radius (r) and outer radius (R) in an annulus.