Am I correct, if the answer is by using as area.
Use cylindrical shells to find the volume of the solid that is generate when the region that enclosed by , , is revolved about the line
As it said "cylindrical shells" to find the volume.
I transform to
The area of this surface is , and then integrate from a to b to get cylindrical shells formula. For this problem, I changed a to b to c to d. And to
My problem is to be revolved about the line y=1, that means it similar to revolve about x-axis, but higher 1 unit. I don't know how to calculate it.
I don't know how to find y and f(y).
Please help, thank you.