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Evaluate each of the following without using a calculator.

`log_()(1) =`  

 `log_(2)(1/2) =`  

 `log_(6)(36) =`  

 `log_(1/2)(8) =`  

 `log_(9)(-1) =`  

 `log_(1/7)(1/7) =`  

 `log_(27)(3) =`