Log2(27)-2 log2(3)+log2(2/3)
Log₂(27)- 2 log₂(3)+log₂ (2/3) = log₂(27)- log₂(3²)+log₂ (2/3) = = log₂(27)- log₂(9) +log₂ (2/3) = log₂(27 : 9 * 2/3) = log₂(3 * 2/3) = log₂(2) = 1
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