Question: 12. Evaluate the double integral / (3x + y) dA where A is the region in the first quadrant that lies inside the circle x2

12. Evaluate the double integral / (3x + y) dA where A is the region in the first quadrant that lies inside the circle x2 + y = 4 and outside the circle x2 +y? = 1. Hint: Use polar coordinates

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