Technique
Solving AX = B
- the column of unknowns
- the column of constants
A linear system written in matrix form is solved by multiplying on the left by the inverse of the coefficient matrix.
15
questions use it
11
of them past-year
2017–2026
years it has appeared
0%
rated HARD
3
exams
Used alongside
How often each of these appears in the same solution as this one.
15 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