Question

rezolvati in R ecuația log in baza 3 din (x pătrat -16)=2

Answer 1

[tex]\log_3(x^2 -16)=2\\ C.E.\:x^2-16\ \textgreater \ 0\\ x^2-16=3^2\\ x^2=9+16=25\\ \sqrt{x^2}=5\\|x|=5\Leftrightarrow x=\pm5\:verifica\:C.E.\\ x\in\{-5,5 \}[/tex]