(1/3)^2×+1>akar27/3^×-1

(1/3)^(2x + 1) > √(27/3^(x - 1)
1/9^x + 1/3 > √(9^x - 9)
1/9^x + 1/3 > 9^(1/2x) - 3
1/9^x > 3^x .(-3 - 1/3)
1/9^x > 3^x .(-10/3)
1/3^2x > 3^x .(-10/3)