Question

D12
If a matrix is self inverse then which of the following is incorrect
(a) adj(A) = |A|A
(b) A2 = 1
(C)A adj(A) = 1
(d)A3 = A-1​

Answer 1

Answer:

In mathematics, a matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. For example, the dimension of the matrix below is 2 × 3, because there are two rows and three columns: Provided that they have the same size, two matrices can be added or subtracted element by element