Logaritma 3log (9/81)

³log 9/81=
³log1/9=
³log1/3²=
³log3-2= -2

³log(9/81)
= ³log(1/9)
= ³log1 - ³log9
= ³log3⁰ - ³log3²
= 0. ³log3 - 2. ³log3
= 0 . 1 - 2 . 1
= 0 - 2
= -2