Решите неравенство

(1/9)^((2x+3)/(4x-1))≤ 1/81

Решение:

(1/9)^((2x+3)/(4x-1))≤ 1/81
(1/9)^((2x+3)/(4x-1))≤ (1/9)^2
(2x+3)/(4x-1)≥2
(2x+3-8x+2)/(4x-1)≥0
(-6x+5)/(4x-1)≥0
x1=5/6
x2 не равно 1/4
Ответ: (1/4;5/6]