Question

Resolva a inequação x^4 ≥ 16.

Answer 1

$x^4\geq 16\\ \\ x^4=16\\ \\ x=\pm\sqrt[4]{16} \\ \\ x=\pm\sqrt[4]{2^4} \\ \\ x=\pm2\\ \\ esquema\\ \\ +++\bullet^{-2}----\bullet^2++++\\ \\ como~~pediu~~\geq \\ \\ S=\{x\in/x\leq -2~~ou~~x\geq +2\}$