Property
Consistency of a linear system
- the coefficient determinant
A square system has a unique solution when the coefficient determinant is non-zero; when it is zero the system has either no solution or infinitely many, decided by the augmented system.
28
questions use it
6
of them past-year
2017–2025
years it has appeared
21%
rated HARD
1
exam
Used alongside
How often each of these appears in the same solution as this one.
28 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