B) Integrate f over the given region 1. Square f(x, y) = 1/(xy) over the square 1 ≤x≤ 2, 1≤y≤2 2. Triangle f(x, y) = x² + y² over the triangular region with ver- tices (0, 0), (1, 0), and (0, 1) 3. Rectangle f(x, y) = y cos xy over the rectangle 0≤x≤ π, 0 ≤ y ≤1

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A: As per company rule we will solve the first part. For other parts kindly post in other question.

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A:

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A: As per our guidelines we are supposed to answer only first question.kindly repost other parts. Thank…

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A: Now,

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A: Hey. Thanks for posting your queries. Firstly, let's inform you that as per our Bartleby Guide line,…

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A: Note:- Since you have asked multiple question As per our policy, we will solve the first question…

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A:

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A:

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A: In this question we have find δfδy at (x, y)=(-7, 1)

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A:

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A: Given that

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A: Use parametric to solve