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What is the value of \(2^x + 2^{-x}?\)
(1) \(x < 0\)
(2) \(4^x + 4^{-x} = 23\)
Answer: B
Source: Official Guide
(1) \(x < 0\)
(2) \(4^x + 4^{-x} = 23\)
Answer: B
Source: Official Guide
