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Mathematics · Indices, logarithms and surds

MathematicsIndices, logarithms and surdsJAMB

Solve 2^(2x) − 6(2^x) + 8 = 0.

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Answer: C. x = 1 or x = 2

Let y = 2^x: y² − 6y + 8 = 0 gives y = 2 or 4, so x = 1 or 2.

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