Question

va rog problemele din imagine

Answer 1

1)

$\it 3^{x+1} +3^x+3^{x-2} \ \textless \ 35 \Leftrightarrow 3^{x-2}(3^3+3^2+1) \ \textless \ 35$

$\it 3^{x-2}\cdot35 \ \textless \ 35|_{: 35} \Leftrightarrow 3^{x-2} \ \textless \ 1\Leftrightarrow 3^{x-2} \ \textless \ 3^0 \Leftrightarrow x-2 \ \textless \ 0$

$\it x \ \textless \ 2\Leftrightarrow x\in (-\infty,\ 2).$