Question

Which one is incorrect? (a) A unit matix is a scalar matrix;(b) A scalar matrix is a diagonal matrix;(c) A unit matrix is a diagonal matrix ;(d) For any two matrices, the addition of matrices exists

Answer 1

d is incorrect
all others a,b,c are correct

10 th standard tamilnadu state board exam

Answer 2

Answer:

d) for any two matrices the addition of matrix exists

Step-by-step explanation:

first of all we should go on with the definitions of scalar,diagonal,unit matrices

scalar matrix:

all diagonal elements are same

unit matrix:

all the diagonal elements are unit

diagonal matrix:

other than diagonal elements remaining elements are zero

matrices are added only if they belong to same order

so the correct option is d