Question

cine se descurca? dau coroana...

Answer 1

$log_{x}(3x-2)=2$
x>0;x≠1
3x-2=x²
x²-3x+2=0
Δ=9-8=1
x1=1∉DVA
x2=2

x^7-3x+2=0
(x-1)(x^6+x^5+x^4+x^3+x^2+x-2)=0
x=1∉DVA