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WorksheetsMATHED 204 - MATRICES
Total questions: 15
Worksheet time: 5mins
(a) is used to denote a rectangular array of elements in rows and columns. The elements in the array are usually numbers, and brackets may be used to mark the beginning and the end of the array.
How many columns are in a 5 x 4 matrix?
5
20
4
9
An n×n matrix is called a square matrix of order n, and a square matrix A=[aij]n×n with aij=0 whenever i=j is known as a _______________ matrix.
Identity
Associative
Diagonal
Special
Addition of matrices is commutative.
True
False
What are the dimensions of this matrix?
2 x 3
6 x 1
3 x 2
1 x 6
Can the operation be performed?
Yes
No
What must be true in order to ADD two matrices?
They must be square.
The dimension must be equal.
The determinant can't equal 0.
The column of the 1st must equal the row of the 2nd.
Is multiplication of matrices commutative? (Is AB = BA?)
Yes
No
Multiplication of matrices is associative. That is A(BC)=(AB)C
True
False
The number of _________ in A must equal the number of __________ in B in order to form the product AB.
rows; columns
columns; rows
rows; rows
columns; columns
If Matrix A has dimensions of 2 x 3, and Matrix B has dimensions of 3 x 4, then A x B has dimensions of
2 x 4
3 x 3
4 x 2
Not defined
If Matrix A has dimensions of 2 x 3, and Matrix B has dimensions of 3 x 4, then B x A has dimensions of
2 x 4
3 x 3
4 x 2
Not defined
(B+C)D=BD+CD is a __________ property of multiplication.
Commutative
Associative
Distributive
Special
Add the two matrices.
Not defined
Multiply.
