19. What is the area of the closed region in the xy-plane bounded by y2 = 4 – x and y2 = 4 – 4x ?
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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 following is the graph of the closed region in the xy-plane bounded by y2 = 4 – x and y2 = 4 – 4x:

Thus, the area of the closed region is given by,
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