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8-52.
  1. Let y = 3x + 1, y = 0, x = 0, and x = 2. Find the volume of the region revolved about each of the lines below. Homework Help ✎

    1. x-axis

    2. y-axis

    3. y = −1

    4. Explain why is the incorrect set-up for a washer given.

Be sure to sketch the region before beginning.

If y = 3x + 1, then x = log3(y − 1).

Notice, both the outer and the inner radii are 1 unit longer than in part (a).

True or False? R2r2 = (Rr)2