Question

3^(X+2)+3^(X-1)<28
Va rog, o solutie corecta

Answer 1

$3^{x+2}+3^{x-1} \ \textless \ 28$
[tex]3^{x-1+3} + 3^{x-1} \ \textless \ 28 [/tex]
$3^3 * 3^{x-1} + 3^{x-1} \ \textless \ 28$
$3^{x-1} * 28 \ \textless \ 28$
[tex]3^{x-1} \ \textless \ 1 [/tex]
$3^{x-1} \ \textless \ 3^{log_3 1}$
$x-1 \ \textless \ log_3 1$
x - 1 < 0 
x < 1