Question

решите на фото. ......,

Answer 1

$log_3(x^4)+log_3(9x)=12\ log_3(x^4*9x)=12\ log_3(9x^5)=12\ 9x^5=3^1^2\ x^5= frac{3^1^2}{3^2}\ x^5=3^1^0\ x= sqrt[5]{3^1^0}\ x=9$