Technique
Determinant equations and their roots
- the variable in the entries
Setting a determinant containing a variable to zero produces a polynomial equation, and its roots are usually read off by inspection or through the sum and product of roots.
17
questions use it
10
of them past-year
2018–2026
years it has appeared
41%
rated HARD
2
exams
Used alongside
How often each of these appears in the same solution as this one.
17 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.
All Matrices & Determinants formulas