Răspuns:
Explicație pas cu pas:
a) [tex]16^{x} \geq 512\\(2^4)^{x} \geq2^9\\2^{4x} \geq2^9\\4x \geq9\\x \geq2,25[/tex]
b) [tex]5^{x} <0,008\\5^{x} <\frac{8}{1000} \\5^{x} <\frac{1}{125} \\5^{x} <\frac{1}{5^{3} }\\5^{x} <5^{-3}\\x <-3[/tex]
