Răspuns:
Explicație pas cu pas:
a) 2^4x >= 2^9, 4x >=9, x >=9/4
b) 5^x < 8/1000 = 1/125 =1/5^3= 5^(-3)
x < -3
c) (5/22)^(4x-5)<= 44/10= 22/5= (5/22)^(-1)
4x -5 <= -1, 4x <= 4, x <= 1
d) 0,2 = 2/10 = 1/5 = 5^(-1)
5^(-3) >= 5^(3(x-4))
-3 >= 3x -12; 9 >= 3x, x <= 3
etc.