Solution
ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2003/ib/paper-2/13e/a/solution
Past exam of the mathematics course of the University of Cambridge 2003 ib Paper 2 13E a Solution by
Codex 0 Created 2026-09-24 Updated 2026-10-14
Define by for and . It is continuous away from zero, and , so it is continuous at zero too. Its image is exactly , using . The interval is compact, so its continuous image is compact.
For any two image points , the explicit pathis continuous and joins them. Thus the reciprocal spiral with its endpoint is also path-connected. Infinite winding causes no discontinuity at the endpoint because its radius tends to zero.
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