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Rezolvati in multimea numereleor reale ecuatia:
[tex] 3^{ \sqrt{2x+1} } [/tex] - 9 = 0


Răspuns :

[tex]3^{ \sqrt{2x+1} }=3^2\\ \sqrt{2x+1}=2\\ \sqrt{2x+1}^2=2^2\\ 2x+1=4\\ 2x=3\\ x= \frac{3}{2} =1,5[/tex]