Prove that
`|(9,8,7),(6,5,4),(3,2,1)| = 0`.

The order of the matrices [{:(1,2,3),(4,5,-1):}], [{:(2,4),(9,2),(6,3),(4,1):}] , [{:(4,5,6),(3,2,1),(9,8,7):}] respectively are :

the mode of the data 8, 4, 5, 3, 6, 7, 7, 8, 4, 6, 8, 9 and 9 is 7.

Find the matrix A such that : [(1 ,0 ),(0 ,1)]A=[(3 ,3 ,5 ),(1, 0 ,1)] (ii) A[(1, 2, 3 ),(4, 5 ,6)]=[(-7,-8,-9 ),(2, 4 ,6)]

Find the order of the matrix [{:(1,2,3,4,5,6,7),(5,6,7,8,4,5,6),(9,10,11,0,10,9,11):}]

If A=[(3,9,0),(1,8,-2),(7,5,4)], B=[(4,0,2),(7,1,4),(2,2,6)] , verify that 3(A+B)=3A+3B .

Find the rank of the matrix A=[[9,7,3,6],[5,-1,4,1],[6,8,2,4]]

If f = {(1,4), (2,5),(3,5) and g ={(4,8),(5,7),(6,9)}, then gof is