MATH125 Lecture 16: 16

• School: University of Alberta
• Department: Mathematics
• Course: MATH125
• Professor: Nikita

Document Summary

If a and b have di erent sizes the sum a + b is not de ned. 2 6 5 ] , b = [ 3 1 1. A + b = [ 2 5 1. Let a = (aij) be a matrix of size m n and let c be a scalar. Then the scalar multiple ca is a matrix of size m n obtained by multiplying each entry of a by c. thus ca = (caij). If a is the above matrix and c = 2 then. The matrix ( 1)a is called the negative of a and it is denoted by a. Let a and b be two matrices of the same size. Then the matrix a + ( b) is called the di erence of a and b and it is denoted by a b. If a and b have di erent sizes the di erence a b is not de ned.