# How AB is defined?

## How AB is defined?

\ ˈā-ˈbē \ Definition of AB (Entry 4 of 6) : the one of the four ABO blood groups characterized by the presence of antigens designated by the letters A and B and by the absence of antibodies against these antigens.

## How do you find AB of a matrix?

In order for matrix multiplication to be defined, the number of columns in the first matrix must be equal to the number of rows in the second matrix. To find A B AB AB , we take the dot product of a row in A and a column in B.

What is AB in matrices?

For matrix multiplication, the number of columns in the first matrix must be equal to the number of rows in the second matrix. The resulting matrix, known as the matrix product, has the number of rows of the first and the number of columns of the second matrix. The product of matrices A and B is denoted as AB.

How do you find AB order?

The product AB can be found if the number of columns of matrix A is equal to the number of rows of matrix B. If the order of matrix A is m x n and B is n x p then the order of AB is m x p . Solution : (i) Order of A is 3 x 3, order of B is 3 x 3.

### What is a-b/b-a called?

mathematics. Commutative law, in mathematics, either of two laws relating to number operations of addition and multiplication, stated symbolically: a + b = b + a and ab = ba. From these laws it follows that any finite sum or product is unaltered by reordering its terms or factors.

### What are the order of matrix?

The order of matrix is general represented as Am×n A m × n , where m is the number of rows, and n is the number of columns in the given matrix. Also, the multiplication answer of the order of matrix (m × n) gives the number of elements in the matrix.

What is associative law of matrix?

Associative Law of Addition of Matrix: Matrix addition is associative. This says that, if A, B and C are Three matrices of the same order such that the matrices B + C, A + (B + C), A + B, (A + B) + C are defined then A + (B + C) = (A + B) + C.

What does AB in algebra mean?

AB. The line segment between A and B. Line “AB” The infinite line that includes A and B.