Question

10 баллов помогите решить!!

Answer 1

(1/2)^-3х=>1/2
-3х <= 1
х => -(1/3)

Answer 2

$2^{3x} geq frac{1}{2} \\2^{3x} geq 2^{-1}\\3x geq -1\\x geq - frac{1}{3} \\xin [-frac{1}{3}, +infty )$