" Among "_(10)A^(20),_(11)B^(21),_(11)C^(22)" and "_(12)D^(22)" the isobar combination is "

Among ._(10)A^(20) ._(11)B^(21) ._(11)C^(22) and ._(122)D^(22) the isobar combination is

If A=[{:(a_(11),a_(12),a_(13)),(a_(21),a_(22),a_(23)):}]" and "B=[{:(b_(11),b_(12)),(b_(21),b_(22)),(b_(31),b_(32)):}] then show that AB and BA both exist. Find AB and BA.

Given A = A=[{:(1,-1),(2,0):}],B= [(3,-2),(1,1)] "and" " "C= [{:(1,1),(2,2):}] , find a matrix X such that AXB = C.

let A ={{:({:(a_(11),a_(12)),(a_(21),a_(22)):}):a_(ij){0,1,2} and a_(11)=a_(22)} then the number of singular matrices in set A is

let A ={{:({:(a_(11),a_(12)),(a_(21),a_(22)):}):a_(ij){0,1,2} and a_(11)=a_(22)} then the number of singular matrices in set A is

Consider A=[(a_(11),a_(12)),(a_(21),a_(22))] and B=[(1,1),(2,1)] such that AB=BA. then the value of (a_(12))/(a_(21))+(a_(11))/(a_(22)) is

Consider A=[(a_(11),a_(12)),(a_(21),a_(22))] and B=[(1,1),(2,1)] such that AB=BA. then the value of (a_(12))/(a_(21))+(a_(11))/(a_(22)) is