Question

ребята умоляю помогите срочно??!!

Answer 1

$3^{x+2}+ 3^{x-1}<28\\\\3^{x-1}( 3^{3}+1)<28\\\\3^{x-1}*28<28\\\\3^{x-1}<1\\\\3^{x-1}< 3^{o}\\\\x-1<0\\\\x<1$

Ответ : x ∈ (- ∞ , 1)

Answer 2

$3 {}^{x + 2} + 3 {}^{x - 1} < 28 \\ \\ ( {3}^{3} + 1) \times 3 {}^{x - 1} < 28 \\ \\ (27 + 1) \times 3 {}^{x - 1} < 28 \\ \\ 28 \times 3 {}^{x - 1} < 28 \\ \\ 3 {}^{x - 1} < 1 \\ \\ 3 {}^{x - 1} < 3 {}^{0} \\ \\ x - 1 < 0 \\ \\ x < 1$