If `A=[[2,4,6],[3,5,7]`,show that `(A')'=A`

If A=[[1,3,4],[2,6,7]] ,show that (A')'=A

If A=[[2,-3],[5,-4],[-6,1]],B=[[2,1],[4,-1],[-3,3]] and C=[[1,2],[-1,4],[-2,3]] ,show that (A+B)^T=A^T+B^T

If A=[[2,-3],[5,-4],[-6,1]],B=[[2,1],[4,-1],[-3,3]] and C=[[1,2],[-1,4],[-2,3]] ,show that (A-C)^T=A^T-C^T

If A=[[2,-3],[5,-4],[-6,1]],B=[[-1,2],[2,2],[0,3]] and C=[[4,3],[-1,4],[-2,1]] show that: A+B=B+A

If A = [[3,1],[-1,2]] then show that: A^2-5A+7I = 0 .

If A=[[1,2,-3],[4,3,5],[3,-6,4]] ,then Show that A+A' is symmetric

If A=[[1,2,-3],[4,3,5],[3,-6,4]] ,then Show that A-A' is skew-symmetric

If A=[[-1,2],[4,-3],[5,6]] and B=[[0,3,5],[4,2,6]] find AB and BA.

If A={2,4,6} and B={1,2,3,4,5} , then show A uu B by using Venn diagram.