If `A=[[5,-2] , [-1,5]]` then `A^(-1)=`

If A=[[-1,5],[-3,2]] , then adj A= (A) [[2,3],[-5,-1]] (B) [[1,-5],[3,-2]] (C) [[2,-5],[3,-1]] ,(D) [[-2,5],[-3,1]]

If the rank of the matrix [[4,2,1-x],[5,k,1],[6,3,1+x]] is 2 then .k= (5)/(2) ,x= (1)/(5) k= (5)/(2) , x!=(1)/(5) k= 1/5 , x= 5/2 none of these

If A=[(2,3,4),(-3,0,2)], B=[(3,-4,-5),(1,2,1)], C=[(5,-1,0),(7,0,3)], then find A+B+C.

If A=[(1,4),(3,2),(2,5)], B=[(-1,-2),(0,5),(3,1)] , find the matrix D such that A+B-D=0 .

If the rank of the matrix [[4,2,1-x],[5,k,1],[6,3,1+x]] is 2 then k= 5/2 , x=1/5 k= 5/2 , x!=1/5 k= 1/5 , x=5/2 none of these

Show that the matrix [[1,-1,5],[-1,2,1],[5,1,3]] is symmetric.

The adjoint of the matrix [(2,5),(3,1)] is (A) [(2,5),(3,1)] (B) [(1,-5),(-3,2)] (C) [(1,-3),(-5,2)] (D) [(-1,3),(5,-2)]

Plot the following points on the coordinate plane. What do you observe ? (a) (-2,-3), (-1, -3), (0, -3), (2, -3) (b) (5,3), (5, 2), (5, 1), (5,0), (5, -1)

Write the following rational numbers in ascending order: (i) (-3)/(5),(-2)/(5),(-1)/(5) (ii) (-1)/(3),(-2)/(9),(-4)/(3)( iii) (-3)/(7),(-3)/(2),(-3)/(4)

Compute the following: [[2,3,1],[5,-1,2],[0,3,5]]+[[1,-2,3],[-3,1,5],[6,2,0]]