Property
Scalar matrices
- the common diagonal entry
- the identity matrix
A scalar matrix is a diagonal matrix whose diagonal entries are all equal, so it behaves like the scalar k in every product.
13
questions use it
11
of them past-year
2015–2026
years it has appeared
0%
rated HARD
3
exams
Used alongside
How often each of these appears in the same solution as this one.
13 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