 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2025/ib/paper-2/7h/a/solution

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

A set is convex when it contains every segment joining two of its points. A function on a convex set is convex when

f (t x + (1 - t) y) \leq t f (x) + (1 - t) f (y)

for all

x, y

and

0 \leq t \leq 1

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