Question

1.Rezolvati: 3 la puterea x+3 la puterea x+1=36

Answer 1

$3^x+3^{x+1}=36 \\ 3^x+3^{x}*3=36$
Notam $3^x=t$
[tex]t+3t=36 \\ 4t=36 \\ t=36:4 \\ t=9 \\ 3^x=3^2 \\ x=2[/tex]