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Question: 6 show that the set a cioo1u1 oo is starshaped...

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6. Show that the set (a) CI-oo,-1U[1, oo)) is star-shaped but not convex; (b) (-1,1) is not open in C. (e) What is the boundary of the set E(r.y) E C: v-sin() Justify your answer.
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