Want to confirm ans (1 Viewer)

[Run hard@thehsc]

For the following volume of revolution question (part d), what did you guys get:

I think I got 16pi/105 unit cubed. Can someone confirm this? Thanks

 

[cossine]

For the following volume of revolution question (part d), what did you guys get:
View attachment 35498
I think I got 16pi/105 unit cubed. Can someone confirm this? Thanks

x(x^2-1) = x(x+1)(x-1)

bounds from -1 to 1
pi integral (x^3 -x)^2 dx

What your taking is the sum of an infinite number circles across the x-axis

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Can you confirm the answer

 

[mmmmmmmmaaaaaaa]

16/105 pi is correct