Matrices Flashcards
1
Q
Addition and Subtraction of Matrices
A
Add or subtract corresponding elements
2
Q
Scalar Multiplication
A
Use the scalar(a number) to multiply each element in the matrix.
3
Q
Equivalent Matrices
A
Corresponding elements are equal
4
Q
Matrix Multiplication
A
Rows of the first matrix by column of second matrix
5
Q
Determinant of 2*2 matrix
A
ad-bc
6
Q
Singular matrix
A
Determinant equals 0
Have no inverse
7
Q
Amount of a 2*2 matrix
A
a b adjoins = d -b
c d -c a
8
Q
Inverse of a 2*2 matrix
A
1/determinant(adjoint)
9
Q
Solving simultaneous equations using matrices
A
B=A^-1C
