A cura di: Gianluca
$log_3[(log_(1/3)x)/(1+3x)]>0$
${((log_(1/3)x)/(1+3x)>1),(1+3x>0):}$ ${(1+3x<1/3),(x> -1/3):}$
${(3x-<1/3-1),(…):}$ ${(x-<-2/9),(x>–1/3):}$
SOLUZIONE_Sistema $rarr$ $-1/3-<x-<-2/9$
di Anoè Gianluca – www.chenesoio.com
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