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Question
Select the correct answer from given alternatives.
Find x, if 2log2 x = 4
Options
4, −4
4
−4
not defined
Solution
4
Explanation:
2 log2 x = 4, x > 0
∴ log2 (x2) = 4
∴ x2 = 16
∴ x = ± 4
∴ x = 4
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