8. Which expression below is equal to
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A.
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B.
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C.
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D.
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E.
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Solution: The answer is A
The integral in question is the double integral of 4x3 over a plane region D, defined as,
The graph of D:
However, region D can be expressed differently, as follows:
The graph of D:
Thus, the double integral of 4x3 over the region D can be rewritten as,
