If any two rows (or columns) of a determinant are interchanged, then the value of determinant
A
Remains same
B
Becomes zero
C
Changes sign
D
Doubles
Analysis & Theory
Interchanging two rows or columns changes the sign of the determinant.
If two rows (or columns) of a determinant are identical, then determinant value is
A
1
B
0
C
Unchanged
D
Infinity
Analysis & Theory
A determinant with two identical rows/columns is zero.
If all elements of a row (or column) are multiplied by k, the determinant is
A
Divided by k
B
Multiplied by k
C
Unchanged
D
Becomes zero
Analysis & Theory
Scaling a row/column by k multiplies the determinant by k.
If the whole determinant is multiplied by k, then determinant becomes
A
k times original
B
k^n times original
C
Unchanged
D
Zero
Analysis & Theory
For an n×n matrix, multiplying every row/column by k scales determinant by k^n.
The determinant of a triangular matrix (upper or lower) is equal to
A
0
B
Sum of diagonal elements
C
Product of diagonal elements
D
Square of diagonal elements
Analysis & Theory
Determinant of triangular matrix = product of diagonal elements.
The determinant of a matrix and its transpose are
A
Always equal
B
Always opposite
C
One is zero
D
Unrelated
Analysis & Theory
det(A) = det(Aᵀ).
If one row (or column) is sum of two terms, then determinant can be expressed as
A
Product of two determinants
B
Sum of two determinants
C
Zero
D
Inverse determinant
Analysis & Theory
Determinants are linear in each row/column: can split into sum of two determinants.
If a row (or column) is written as sum of proportional rows, then determinant is
A
1
B
Zero
C
Negative
D
Unchanged
Analysis & Theory
If two rows/columns are proportional, determinant is zero.
If A and B are square matrices of same order, then |AB| equals
A
|A| + |B|
B
|A| × |B|
C
|A| − |B|
D
|A|/|B|
Analysis & Theory
Property: det(AB) = det(A) × det(B).
If determinant of matrix A is zero, then matrix A is
A
Invertible
B
Non-invertible
C
Identity
D
Diagonal
Analysis & Theory
If det(A)=0, A is singular (non-invertible).