(1/3)^x+2+5*(1/3)^x+1-(1/3)^x<7

(1/3)ˣ⁺²+5*(1/3)ˣ⁺¹-(1/3)ˣ<7(1/3)²*(1/3)ˣ+(5/3)*(1/3)ˣ-(1/3)ˣ<7(1/9)*(1/3)ˣ+(2/3)*(1/3)ˣ<7(7/9)*(1/3)ˣ<7   |÷7(1/9)*(1/3)ˣ<1(1/3)ˣ<9(1/3)ˣ<(1/3)⁻²x>-2Ответ: x∈(-2;+∞).