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# Calculus of revolution thingy watch

1. Okay, so how do I write the volume out when there is no given interval?
2. (Original post by xAikx)
Okay, so how do I write the volume out when there is no given interval?
Find the points where your function is zero.
3. (Original post by zetamcfc)
Find the points where your function is zero.
Okay so for 3) I'll just do x=0 and then is that both my limits?

Like a=0 or b = 0?
4. (Original post by xAikx)
Okay so for 3) I'll just do x=0 and then is that both my limits?

Like a=0 or b = 0?
I'd advise you to graph your function (It intersects the x-axis at 2 points)

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