Why inverse matrices? The inverse of a matrix is also called the reciprocal of the matrix. Since matrices cannot be divided, inverse matrices are used as the reciprocal operation of multiplication of matrices. Notation If A is a square matrix, then its inverse is also a square matrix and it is...
Addition and subtraction of matrices Requirement: Matrices must be of the same order. How to: Corresponding elements are added (in addition) or subtracted (in subtraction). Example Consider the two matrices given below. a. Calculate the matrix A + B. The two matrices are...
POPULATIONS AND SAMPLES A population consists of all members (people, objects or events) of a specified group about which information is sought. Examples all the teenagers in a country; all the students in a school; all the kangaroos in Australia. A sample is a representative subset of the population and it consists of some members (people, objects or...
