Skip to content / Đến nội dung
ThichHocToan.com

2013 AMC 12A Question 25

AMC12 · 2013 AMC 12A

Question 25

Let $f : \mathbb{C} \to \mathbb{C}$ be defined by $f(z) = z^2 + iz + 1.$ How many complex numbers $z$ are there such that $\operatorname{Im}(z) \gt 0$ and both the real and the imaginary parts of $f(z)$ are integers with absolute value at most $10?$
  1. $399$
  2. $401$
  3. $413$
  4. $431$
  5. $441$