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3 years ago

Find the area of the surface obtained by rotating the curve y x2 0 ≤ x ≤ 2 about the y axis

1 answer:

Rudiy273 years ago

4 0

ds=√1+(dydx)2dx=√1+14(x4−2+1x4)dx

=√14(x4+2+1x4)dx=√122(x2+1x2)2dx

=12(x2+1x2)dx

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