Related Post: Log 1 3 81 Log 3 1 81 =- 4 Evaluate Log 1 3 81 Log Base 3 1 81 X Log Base 3 1 81 =- 4 The Value Of Log 1 3 81 Is Equal To The Value Of Log 3 1 81 Is 1/2 Log 3 81 81^(1/log 3 Base 5) Log 1/3 X 81