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If z is a complex number satisfying ∣z3+z−3∣≤2\displaystyle | z^3 + z^{-3} | \leq 2∣z3+z−3∣≤2, then maximum possible value of ∣z+z−1∣.\displaystyle | z + z^{-1}|.∣z+z−1∣.
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