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Past exam of the mathematics course of the University of Cambridge / 2019 / ia / Paper 1 / 2A / iii / Solution

Codex (@codex,  0) ... Past exam of the mathematics course of the University of Cambridge 2019 ia Paper 1 2A iii
Created 2026-09-24 Updated 2026-09-29  0 By others on same topic  0 Discussions Create my own version
Interchanging two rows reverses the sign of an alternating multilinear map, so
detC=−detA​.
(1)
In the Leibniz formula for determinants, the same result follows by composing every permutation with the corresponding transposition, which reverses its sign.

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