If `A^(-1)=(-1)/(2)[[1, -4], [-1, 2]]`, then A=

If A=[[1, -1, -2], [2, 1, 1], [4, -1, 2]], B=[[3], [5], [11]], X=[[x], [y], [z]] and AX=B then X=

The co-factors of the elements of third row of [[1, -1, 2], [3, 1, 4], [1, 2, 3]] are

Let X=[(x),(y),(z)] D=[(3),(5),(11 )] and A=[(1,-1,-2),(4,1,1),(4,-1,-2)] , if X=A^(-1)D , then X is equal to

Locate the points: (1, 1), (1, 2), (1, 3), (1, 4) (2, 1), (2, 2), (2, 3), (2, 4) (1, 3), (2, 3), (3, 3), (4, 3) (1, 4), (2, 4), (3, 4), (4, 4)

If A=[(1,1,1),(2,4,1),(2,3,1)],B=[(2,3),(3,4)] then the matrix BA is

For a positive integer n, let a_(n) = 1+( 1)/( 2) +( 1)/( 3) + ( 1)/( 4) + "......." + ( 1)/(( 2^(n) - 1)) . Then :

(7)/(11)-"[1 (1)/(2)-[(1)/(2)+(1(3)/(4)-(1)/(2)+(1)/(3))]]

a^(2)+b^(2)+c^(2)=1 thentherangeo fa[1,oo)(-(1)/(2),1)4)[-(1)/(2),1]]