Consider the complex number z=9∠230∘. What is the smallest positive integer n such that zn is a real number? n= ?

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Q: ) Show that the image of the annulus {z: 1 // } W = Z²-1 is the domain { W: Rew > -1, \w - 1²/31/

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A: Simplify the above question We can write 5=3+2

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