Question

For each of the sets in Exercises 1 to 8, (a) describe the interior and the boundary, (b) state whether the set is open or closed or neither open nor closed, (c) state whether the interior of the set is connected (if it has an interior). B={z = x + iy: Iz + l| > 1 and x < 03

Wow.. I spend 5hous to understand these problems but cant.. anyone help me?

Can anyone solve these question and explain why the answer is open or closed or connected or interior boundary?

I have all the answers but I dont understand why.. it is open.. so can anyone explain WHY? Thx!!

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