Example 1 Compute each of the following double integrals over the indi (a) ſf 6xy² dA, R=[2,4]×[1,2] R (b) ff 2x-4y³dA, R=[−5,4]×[0,3] R (c) ſƒ˜x²y² +cos(7x)+sin(7y)dA, R=[−2,−1]×[0,1] R
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∫∫ x^2y^2+cos(πx)+sin (xy)dA, R= [ -2,4] [ 1,2,]
Please I need the full working for all of them
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