1- Find the exact area of the surface obtained
by rotating the curve about thex-axis.
y = x^3 /2 + 1/ 6x , 1/2 ≤ x ≤ 1
2- Find the exact area of the surface obtained by rotating the curve about the x-axis.
x = 1/3 (y2 + 2)3/2, 4 ≤ y ≤ 5
3- The given curve is rotated about the y-axis. Find the area of the resulting surface.
y = 1/3 x3/2, 5 ≤ x ≤ 21
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