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If z is a complex number such that |z| ≥ 2, then the minimum value of 2 1 z + :

1. is strictly greater than 2 3 but less than 2 5
2. is equal to 2 5
3. lies in the interval (1, 2)
4. is strictly greater than 2 5

Correct answer: lies in the interval (1, 2)

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