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

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