Question

Sa se rezolve ecuatiile :
9 la puterea x+1 + 3 la puterea x+1 =2

Answer 1

$9^{x+1} + 3^{x+1} =3$
$3^{2(x+1)} + 3^{x+1} =3$
$3^{3(x+1)} =3$
3(x+1)=1
x+1=$\frac{1}{3}$
x=-$\frac{2}{3}$