log₁/₃ 27√3= - log₃ 3^(3,5) = - 3,5
3^(1/2 log₃ 5 )= 3^( log₃ √5)= √5
log₄ log₂ log₃ 81 = log₄ log₂ log₃ 3⁴ =log₄ log₂ 4= log₄ log₂ 2²=log₄ 2=
= log₂² 2= 1/2 log₂ 2 = 1/2
