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Curvilinear integral of the function f (x, y) = x2 + y2 on a (3,0) centered...

Curvilinear integral of the function f (x, y) = x2 + y2 on a (3,0) centered and 3 radius circle.
a)Calculate the curvilinear integral by expressing the curve in parametrically.
b)Calculate the curvilinear integral by expressing the curve in polar coordinates.
c)Calculate the curvilinear integral by expressing the curve in cartesian coordinates.

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