9. If D= [-1, 1] x [-1, 2], show that € W₁T² dx dy x² + y² + 1 10. Using the mean-value inequality, show that 1 ≤ 6 1≤ 6. dA 35/1/2 DY-x+3 4' where D is the triangle with vertices (0, 0), (1, 1), and (1, 0).

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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