Question

matematica2la puterea x mai mic sau egal cu 8

Answer 1

$2^x \leq 8 \Rightarrow 2^x \leq 2^{log_28}\Rightarrow x \leq log_28 \Rightarrow x \leq log_22^3 \Rightarrow \\ \\ \Rightarrow x \leq 3log_22 \Rightarrow x \leq 3 \Rightarrow x \in (- \infty,3]$