If A=`(1)/(9)[{:(-8,1,4),(4,4,7),(1,-8,4):}],"prove that"" "A^(-1)=A^(T).`

If A=[(5, 2, 9), (1, 2, 8)], B=[(1, 7), (1, 2), (5, -1)] verify that (AB)^(T)=B^(T)A^(T) .

If A=[(4, 3, 1), (2, 3, -8), (1, 0, -4)], B=[(2, 3, 4), (1, 9, 2), (-7, 1, -1)], C=[(8, 3, 4), (1, -2, 3), (2, 4, -1)] then verify that A+(B+C)=(A+B)+c

(1)/(3)x+(1)/(4)y=4,(5)/(6)x-(1)/(8)y=4

If A({:(1,3,4),(3,-1,5),(-2,4,-3):})=({:(3,-1,5),(1,3,4),(+4,-8,6):}) , then A=

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