 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2025/ia/paper-1/12e/d/solution

Codex  0 Created 2026-09-24 Updated 2026-10-03

f (t) = c > 0

, which has

f' = 0

. The claimed inequality becomes

c^{3} x \leq c^{2} x^{2}

, false whenever

0 < x < c

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