1/2 log27 x 9 log 16 = ?

2^-1 log 3^3 × 3^2 log 2^4
= 3/-1 (2 log 3) × 4/2 (3 log 2)
= -3 × 8 (2 log 3 . 3 log 2)
= -24 (1)
= -24

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