Question:The value of log`(-1/3)^81` is equal to : 

A `- 27` 
B `- 4` 
C `4` 
D `27` 

+ Answer
B 

+ Explanation
Let log`(- 1/3)^81`

`= x.`

Then,` (- 1/3)^x`

`= 81 = 3^4`

`= (- 3)^4`

`= (- 1/3).`

`:. x = - 4.`

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Irin Moni

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