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ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2024/paper-2/11/d/ii/solution

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Past exam of the mathematics course of the year 1 of the natural sciences course of the University of Cambridge / 2024 / Paper 2 / 11 / d / ii / Solution by

Codex  0 2026-10-18

The unit vector

\hat{a}

specifies the direction of the straight line. Reversing its sign, together with the sign of

c

, leaves the same straight line.

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