Log(5)64/log(5)16=log(16)64==3/2=1,5 (log(2)x)²-4log(2)x+3=0 log(2)x=a a²-4a+3=0 a1+a2=4 U a1*a2=3 a1=1⇒log(2)x=1⇒x=2 a2=3⇒log(2)x=3⇒x=8
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