Welcome to your Grade 11 Mathematics chapter 3
After carefully reading the following 30 questions, choose the correct answer.
1.
A matrix is a rectangular array of numbers arranged in:
2.
If a matrix has m rows and n columns, its order is:
3.
The individual numbers in a matrix are called:
4.
Two matrices A and B are equal if:
5.
To add two matrices A and B, they must have:
6.
If k is a scalar and A is a matrix, then kA is obtained by:
7.
The zero matrix O is a matrix where:
8.
For matrix multiplication AB to be defined, the number of columns in A must be:
9.
In general, matrix multiplication is:
10.
A square matrix is a matrix with:
11.
A identity matrix I is a square matrix with:
12.
The transpose of a matrix A, denoted AT, is obtained by:
13.
A square matrix A is symmetric if:
14.
A diagonal matrix is a square matrix where:
15.
A scalar matrix is a diagonal matrix where:
16.
Which of the following is NOT an elementary row operation?
17.
A matrix is in row echelon form if:
18.
In a row echelon form, the first non-zero entry in a non-zero row is called:
19.
Reduced row echelon form (RREF) requires that each leading entry is:
20.
A system of linear equations is consistent if it has:
21.
If a system of equations has more variables than equations, it usually has:
22.
The matrix containing coefficients and constants of a system is the:
23.
If A is a square matrix, its inverse A−1 satisfies:
24.
Gaussian elimination is a method used to:
25.
A matrix A is invertible if and only if its determinant is:
26.
For a 2×2 matrix A=(acbd), the determinant is:
27.
If A and B are invertible matrices of the same order, (AB)−1=
28.
Gauss-Jordan elimination transforms the augmented matrix into:
29.
If a row in the row echelon form of an augmented matrix is $[0, 0, \dots, 0
30.
The sum A+B is commutative, meaning:
