Question

Media geometrica a nr.$3^{x}$ si $9^{y}$ este 9.Aflati cele doua nr.x si y,daca se stie ca x=y+1

Answer 1

[tex]Mg= \sqrt{3^x*9^y} =9 \\ 9= \sqrt{3^{y+1}*3^{2y}} \\ 81=3^{y+1+2y} \\ 3^4=3^{3y+1} \\ 3y+1=4 \\ 3y=3 \\ y=1 \\ iar \\ x=1+1=2[/tex]