`[(7,1,2),(9,2,1)][(3),(4),(5)]+2[(4),(2)]` का मान होगा

[(7,1,2),(9,2,1)]xx[(3),(4),(5)]+2[(4),(2)] is equal to the matrix-

{:[(7,1,2),(9,2,1)]:}{:[(3),(4),(5)]:}+2{:[(4),(2)]:} is equal to

{:[(7,1,2),(9,2,1)]:}{:[(3),(4),(5)]:}+2{:[(4),(2)]:} is equal to

[[7,1,2],[9,2,1]][[3],[4],[5]]+2[[4],[5]] is equal to

3(1)/(12)-[1(3)/(4)+{2(1)/(2)-(1(1)/(2)-(1)/(3))}] का मान है -

यदि (x)/(y)=((3)/(2))^(2)div ((5)/(7))^(0) , तब ((y)/(x))^(2) का मान क्या होगा -

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 :

{:(5,3,7,1),(7,5,9,3),(4,4,4,4),(3,2,?,1):}