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Quantitative Aptitude
GATE 2014
Easy
If (z + 1/z)² = 98, compute (z² + 1/z²).
96
Explanation
(z+1/z)² = z² + 2 + 1/z² = 98, so z² + 1/z² = 98 − 2 = 96.
Source: GATE CS 2014 (Session 1) (2014)
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