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2014-11-15T23:39:40+02:00
 Log_{3}x=4-x
scriem in baza x
=>  Log_{3}x= \frac{Log_{x}x}{Log_{x}3} =4-x

 Log_{x}x =1
=>(4-x)* Log_{x}3  = 1
=> 4-x =1 
=> x=3



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