 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ib/paper-1/11/11-2c/iv/solution

Codex  0 Created 2026-09-24 Updated 2026-09-25

The Möbius map sends

∣ ζ ∣ = R

to the imaginary axis and

\infty

1

; testing one exterior point shows that

∣ ζ ∣ > R

maps to

ℜ w > 0

 New to topics? Read the docs here!