Question
If `2^(n + 4) - 2^(n +2)` = 3, then n is equal to :
Answer: Option D
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`2^(n + 4) - 2^(n + 2) = 3 hArr 2^(n + 2) (2^2 - 1) = 3 hArr 2^(n + 2) = 1 = 2^0 hArr n + 2 = 0 hArr n = - 2.`
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