Câu hỏi 120
Cho $n \in \mathbb{N}^*$ và $E(z) = |z+1| + |z^{2n} + 1|$, $z \in \mathbb{C}$. Tìm
$$ \min\{E(z) \mid z \in \mathbb{C}\}. $$
$$ \min\{E(z) \mid z \in \mathbb{C}\}. $$
MathNet 2019-part-05 — 184 bài (EN–VI) Câu hỏi 120
Math Olympiad Vault · MathNet 2019-part-05 — 184 bài (EN–VI)