If `A=[[2,4],[-5,-1]] ` show that: `|3A|=9|A|`

If A=[[1,1,2],[2,1,3],[5,4,9]] then find |A|

" (a) If "A=[[1,1,2],[2,1,3],[5,4,9]]" then find "|A|

If A=[2-3-5-1 4 5 1-3-4] and B=[2-2-4-1 3 4 1-2-3] , show that A B=A and B A=B .

Given A=([2,-3-4,7]) compute A^(-1) and show that 2A^(-1)=9I-A

Let A={1,2,3,5,9,7} and B={1,2,3,4,5,6,7,8,9,10}, show that A subset B=B

if A=[{:(2,1,3),(1,-1,2),(4,1,5):}]and B=[{:(1,-1,2),(2,1,5),(4,1,3):}], then show that : (i) (A+B)'=A'+B' (ii) (A+4B)'=A'+4B'

If A=[(1,-2,3),(-4,2,5)] and B=[(2,3),(4,5),(2,1)] , find AB and BA and show that AB!=BA

If A=[1 1-2 2 1-3 5 4-9] . Find |A| .

If A=[{:(2,-3),(-4,7):}] , compute A^(-1) and show that 2A^(-1)+A-9I=O .