2 * 3^(x + 1) - 4 * 3^(x - 3) < 150
3^(x - 3) * (2 * 3^4 - 4) < 150
3^(x - 3) * 158 < 150
3^(x - 3) < 75/79
log(3)3^(x - 3) < log(3)75/79
x - 3 < log(3)75/79
x < log(3)75/79 + 3
x < log(3)
ответ:
2 * 3^(x + 1) - 4 * 3^(x - 3) < 150
3^(x - 3) * (2 * 3^4 - 4) < 150
3^(x - 3) * 158 < 150
3^(x - 3) < 75/79
log(3)3^(x - 3) < log(3)75/79
x - 3 < log(3)75/79
x < log(3)75/79 + 3
x < log(3)
ответ: