12) log₁₆ log₁₂ 144 + 2/5 log₂ 32 = log₁₆ log₁₂ 12² + 2/5 log₂ 2⁵ = log₁₆ 2 log₁₂ 12 + 2/5 × 5 log₂ 2 = log₁₆ 2 + 2 = log₂⁴ 2 + 2 = ¼ log₂ 2 + 2 = ¼ + 2 = 2,25
Ответ: 2,25