 Solution

ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2018/paper-1/12/a/i/solution

The region is an unbounded wedge in the first quadrant, lying between the rays

y = x /2

and

y = x

. Both boundaries and the origin are included. For integration in the opposite order, the same region is

y \geq 0

with

y \leq x \leq 2 y

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