2.1 Matrix Operations

Question 1

diagonal matrix

Answer 1

a square n x n matrix whose nondiagonal entries are 0

Question 2

two matrices are equal if

Answer 2

they have the same size and the corresponding entries are equal

Question 3

sum A+B matrices

Answer 3

m x n matrix whose columns are the sums of the corresponding columns in A and B

Question 4

scalar multiple rA

Answer 4

matrix whose columns are r times the corresponding columns in A

Question 5

transpose

Answer 5

the matrix whose columns are formed from the corresponding rows of A