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Let \(z\) be a complex number such that \(|z| = 1.\) Find the largest possible value of \(|z^2 + z - 1|.\)

 

I would appreciate any help, thank you!

 Apr 6, 2020
 #1
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The largest possible value is 5/2.

 Apr 6, 2020
 #2
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As follows:

 

 Apr 6, 2020

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