Покажите действия, как вы решали!! Плииз!

1)

log4 9

_____

log2 81

 

 

 2) log3 (x-3)+log3 (x+1)=log3 5

3) 2 log2 3 - log2 18

 

 

 

 

 

 

 

 

 

 

 

 

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