Formula
Cube roots of unity in determinants
- a non-real cube root of unity
Determinants built from cube roots of unity collapse through these two relations, usually by adding all columns so one becomes zero.
20
questions use it
5
of them past-year
2017–2026
years it has appeared
50%
rated HARD
2
exams
Used alongside
How often each of these appears in the same solution as this one.
20 questions whose solution uses this
Every one was read individually — a question is here because its solution invokes this, not because the stem mentions it.
Every identity this chapter tests, with its own question set.
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